Live Tech Talk - Exhaust Dynamics - Warranty - Kevin Baxter - Pro Twin Performance

For this live tech talk we discuss the basics of exhaust dynamics for your motorcycle. We also touch on how modifications may affect your factory warranty and tuning.

[@JDB5824RG]

Kevin aside from excellent topic you have the talent to communicate to all levels of customer knowledge and keeping all interested. Love your videos ... thank you

[@dannyweldon1389]

Ditto, awesome topics and presentation.

[@ChipsPlace1952]

Kevin, second time I listen to this video. It is great. Keep it up Chip

[@garychandler4296]

I've definitely become a fan. It's clear, a good pace, and well-thought-out!

[@kevinmartin9080]

Thanks for a very good explanation on exhaust dynamics! Nicely done.

[@KevinBaxter]

My pleasure! thanks.

[@jmac6242]

2 years ago, that was 2019. Still, invaluable information. Simply put, IMO Excellent. Great video. Thank You for sharing your vast knowledge.

[@eddiealvarez5493]

Gr8 job Kevin, on the explanation of baffles an non-baffles, please keep it coming. Now I have the understanding about tuning.

[@KevinBaxter]

Thanks, will do! Appreciate it!

[@coastalcustoms4810]

Hey buddy, total RESPECT from Coastal custom Cycles New Zealand

[@JoseMorales-vw4qf]

Thank You Professor Baxter four your teachings. Your teachings should count as college credits. Thanks

[@jamesscott5073]

Excellent rant Kevin. Lots of great information and explanations

[@KevinBaxter]

Thank you kindly!

[@edboda2196]

Another learning curve,keep up the good work.

[@KevinBaxter]

Thank you so much. Appreciate it

[@xlrider1565]

Captain, and Coke in the red plastic cup, TRUE? If so, that was a fave of mine some years ago! That, and Bacardi Black Label Dark Rum, and Coke. Very informative topics, with clear, detailed explanations of repair procedures, tech tips, and specialty tools, if needed. Your explanations are very straightforward, and easy to visualize. Thank you for sharing your professional expertise with the public. I recommend your videos to those seeking tech advice, and information, You ROCK, Kevin! Aloha, from Honolulu, Hi!🤙

[@KevinBaxter]

Thank you very much sir! Aloha! All the best.

[@frankreia4750]

Thanx I'm about half way there. What truly surprised me was I took some old Harley pipes cut them up weld them up all 1 3/4 right to the muffler Wich was a factory sporty muffler 1 gutted put in a 2 1/2 in baffle from a car muffler it's got the twisted livered type holes from end of the muffler is antireversion chamber type the baffle has a layer of steel wool and on the outer wrap of muffler wrap the baffle is suspended in the middle Wich also allows exhaust to pass over both sides of the baffle.l also drilled in line with the louvers a 1/4 in holebehind each louver. Blew me away the difference and it was all 1 3/4 to the muffler. The top after 4500 rpms suffered for sure. But up to that point it spooled up quick couldn't believe it. Thus my trial continues the heads were done by JPRacing heads out of Quebec Canada SE 536 cams considered hot street SE 10.50.1 er something like that piston SE rocker arms and I believe high volume lifters or that sort. While I have the limiter set for 6500 and it loves to hang out from 3500 ROMs up on the track may not corner worth a shit but sure is fun

[@garykozak2914]

Tons of great information in this video. The best I have seen so from any other source on You Tube. I purchased my first Harley last June. It is an 2021 Tri Glide Ultra and I have been trying to evaluate the pros and cons of Stage 1 & 2 upgrade. ( Is it worth the cost). The trikes are heavy and a bit more low end torque would be help. I like the sound of the Rinehart and V&H. The information on the warranty issues was informative.

[@louis-felixcote3540]

You sir posses an impressive wealth of knowledge. Thank you very much for sharing. Love your channel. Cheers.

[@KevinBaxter]

Thank you kindly. I greatly appreciate that.

[@mweeks2000]

Thank you. I can't get enough. Great videos.

[@Sam590ss]

I know I'm a little late to the party lol but👍 this video clears up a lot of questions. Thanks Kevin!

[@KevinBaxter]

Glad it was helpful! Youre welcome sir.

[@jmc2567]

Kevin,you are way cool,taking the time to do all these videos(if thats what they call them now)i have built a few chess and fords 4s,6s, and 8cylinders and worked on a few British and HDs so am mechanical minded and understand cams, valve overlap,ignition timing balancing and most things been working on engines since age about 12 am 52 now and have learnt more about Harleys and associated things camplates,cranks and even exhausts and tires from watching your videos than I have learnt in the last 30 years,the way you explain things and visual demos is great,not boring for experienced people and not to hi-tech for novice,,,I don't think you could do it any better,you are an expert helping all,,thank-you and cheers,stay well,stay safe,from Auckland,New Zealand

[@KevinBaxter]

welcome James. Thanks for the comment. Never made it to NZ...been to OZ. NZ is on the bucket list. I heard from someone in OZ that there are not deadly poisonous animals on NZ....is that correct?

[@staynless7]

Thank you very much for sharing your extensive knowledge Kevin and it is so enlightening to hear the theory behind the advice.

[@KevinBaxter]

Thank you very much sir. When someone offers advice, they should be able to explain why based on facts. Otherwise, its opinion and or hearsay.

[@shanunshelton8515]

This is toast

[@shanunshelton8515]

Toast here

[@shanunshelton8515]

I need to talk with u please sir!

[@dennisgood2108]

Great talk and information,thanks alot

[@joejunior1974]

So much valuable info. Can't thank you enough!

[@robertlumsden942]

great info. i ended up installed S&S 2 into one the super street and had it dyno'd with my stage 2. performs very well. the explanation of reversion was very goood.

[@KevinBaxter]

Right on

[@86Raxor]

That's exactly what I am getting. I had enough of the loud V&H proPipe, it was ok in stage 1 but stage 2 made it way too loud, even with quiet baffle >D

[@jimhohn9881]

I found the video very informative. I’m fussy about exhaust note. Thank you

[@getoffmygrass6974]

Great video Kevin. I went through four exhaust systems on my build before settling on the RB LSR "B" slash cut (not the pro pipe) on my 2002 fxstb 95ci with some goodies. Looks and feels great on the butt dyno. Now, as much as I do love the sound, it does veer away from that traditional Harley sound a bit.

[@KevinBaxter]

I've run a few of those...good pipes. Thanks!

[@empy1776]

I love your "Rants"!!

[@KevinBaxter]

You may be the only one. hahaha. thank you.

[@donaldpruett852]

Awesome! Thanks for this Kevin.

[@SlickWhiskey]

Thank you, as usual, very informative.

[@mickc4633]

I told you when I was running I was just concerned about hurting the bike but I guess I answered my own question.

[@kenster007]

Damn this guy is always a wealth of knowledge.

[@jasonhayes4171]

Great topic, and great advice.

[@adriankiraly5172]

Kevin, you make awesome videos. Very clear and in depth.

[@KevinBaxter]

thank you for subscribing and for the kind words.

[@adriankiraly5172]

Hi Kevin, great work on your behalf. As you know I'm a Victory rider in Australia and I was very disappointed with Polaris' response when my transmission disintegrated. They initially denied warranty due to modifications (PCV, VMDR Cams, Timing Wheel, Torque Tube Intake) It took me 9 months (!!!) going back and forth to get it fixed under warranty. The newly rebuilt engine only lasted 10,000 kms as it spun a crank bearing (repaired crank). Polaris in the final minute supplied a new engine with 1 year warranty with no modifications allowed. I loved the power of the cams, it made a hell of a ride, but decided to keep it stock. To maximize efficiency on a v-twin is it true that only a 2-1 system is the best way to go due to the scavenging effect? Thanks for your response in advance.

[@aaronhughey2134]

Kevin I'm in the process of watching every single video you have on KZbin, even the cars Bro! I'm learning so much from you.

[@edwardparker1027]

Good job explaining exhaust pipes

[@KevinBaxter]

Glad it was helpful! THank you!

[@coinneachmacghilleathain8587]

Extremely informative. I'm all in.

[@KevinBaxter]

thank you sir and welcome!!!

[@tombentley887]

Cobra exhaust very good on the Dyno . On my 2015 103 street glide . Breather plugs and fat wires , 98 ft torque 88 horsepower .

[@theodavies8754]

Vance and Hines work and sound great. The smell of a pre cat barb engine is a good indicator of AFR on idle.

[@RalphRayner-uw1mu]

Very good info, thank you

[@mikemurehead2518]

Love all your videos. I built this motor myself and it rides like a beast but I just feel something isn't right. Starts great and beats my friends vmax at any speed. Put about 3000miles since I made it. Might have to get you to build me a motor if I cant figure it out.

[@kyledavis6127]

Thanks for the great info!

[@speedway61554]

Love your site.

[@ChristosBassCovers]

wonderful talk bro... Very informative

[@KevinBaxter]

Thank you so much 🙂

[@mikehenthorn79]

@@KevinBaxter what is the third exhaust you talked about with the swirled cheese grater look inside and do you sell them on your website?

[@tedteddy9330]

I'm new to channel and enjoy very much. I have a 2020 lowrider 107, I'm thinking about putting on vance&hines slash cut slip-ons and if they are to tinny sounding or don't have enough back pressure. This is my first bike I'm 61 and still learning. THX

[@ernestknight275]

Great job explaining the various subjects. Put a k&n air filter on 103 heritage. Considering decat to remove felt heat. Then tune to richen fuel and cool motor. Advice?

[@zr6966]

Very knowlagable bout harleys. Thanks for information ya giving. Learning lot bout couple things....Q

[@zr6966]

Q by accident. Not suppose mean anything

[@brianbunnell7209]

V&H big radius pipes. Looks and sounds great.

[@rodcameron5129]

Good info I'm in Oz so it makes it hard to buy your products but love listening I have a 120 r I'm currently beefing up the primary side

[@KevinBaxter]

If youre ever near Rollies in Brisbane, pop in and tell Berto or John I said hello....Morgan and Wacker HD - Malcom Martin is a very good friend. Hell....even know the guys at Heavy Duty and APL Performance. Enjoy my time in OZ a great deal.

[@rodcameron5129]

I bought by 120 off Adam and Julie at IPL and talk to him frequently

[@rodcameron5129]

What I'm trying to find is someone that can sell me a Dark Horse compensator in Oz can you help with that ?

[@jmc2567]

See below,meant to be chevs not chess,bluddy spellchecker gets me every time,cheers Kevin, you da man,cheers all ,takecare...

[@rolfwittwer5871]

Great info. Kevin is a rare breed who relates a deep and broad understanding in plain language. But now I'm worried. My brand new, bog stock Lowrider S is consistently returning 50+ MPG (4.5-4.7 L/100km) at legal speeds. I love that economy but will the heads get so hot that the expansion differential between head and valve seat material results in loose seats? My hope is the oil cooling takes care of it but I might invest in a CHT gauge as a precaution. In 35 years of Harleys this is my first new one. I want it to have a long, trouble free life and see me out.

[@shanehazelton8754]

Awesome video that's very informative 👍 If I get bassani 2into1 and power vision tuner I wonder if my local dealer will void entire warranty or just related parts to the tuner? With this new ftc thing with harley I might take the chance with my low rider st I got last week!!! Should I wait 2years for warranty to be up or go for the power

[@allynmcfarlin2074]

God almighty - you are one brilliant SOB.

[@TC-yg4dn]

Hi, great video Kevin!!I Recently purchased 2022 Indian Chief 111 and to make it louder, have been riding it without the muffler/slip-on…Since there’s no back pressure will this damage the engine, possibly burn the valve? Thank you for your help!!

[@davidpritchard8229]

Perfect !

[@rudy8216]

Your talks are great, never thing your not good enough. Please find time to continue these talks, perfect…

[@mickc4633]

I made a few comments before the end. Wish I caught you.live.

[@1500frank]

Thanks for the tip on reversion , I have the CFR exhaust stage 4 with a wood performance 777 cams and a Thundermax Tuner and I am getting the reversion so I am switching the Rinehart 4 inch >>

[@KevinBaxter]

No problem 👍

[@BigRob345]

I ride a 2010 Electra Glide solo 70 percent of the time. I'm looking at cams, Rinehart true duals exhaust, tuner, and air cleaner next year. What's your take for a good set of cams for this bike? I'm a big guy and ride between 2000-3500 rpm consistently

[@jerrytaylor2743]

Thanks for bringing up mm act. Most don’t realize and are. Mislead.

[@jerryhubbard4461]

I have a new HD tri Glide two weeks old 5.13.2021 and I ask the dealer about running Amsoil in my trike after the 1000 check up. He said that he would wait until the two year warentee was out before running Amsiol as the manufacturer might void the warentee.

[@lars1230]

Kevin, Love your videos for sure. I have a question regarding M8 engines direct from the factory. Do M8’s come from the factory with the AFR running lean similar to the Twin Cams? I’ve seen a couple of KZbin videos lately that say that the M8 comes from the factory with an AFR of around 14.5 to 15 which they say where it should be. I think Twin Cams ran around 16 to 17 AFR. Please give me the real info regarding this question. Thanks, Lars.

[@kylemoore9626]

Manufacturers are voiding warranties for not being in EPA compliance now, if you bring your M8 into the dealer for a warranty repair, when they plug it in to the tech tool it checks to see if the ecm has been flashed with anything other than the Harley tech tool or the pro street tuner, if it has, it flags your power train warranty. I flashed my bike to stock once when it was under warranty before they plugged in to turn on my oil cooler fan, they said sometimes it works, but sometimes the scan tool detects it, the tech doesn’t have any control over it. I got lucky. H-D agreed to basically act like EPAs enforcer as part of their settlement with them over the race tuners. That’s why S&S started making 50 and 49 state compliant exhausts.

[@KevinBaxter]

exactly....shame to see it. But...warranties run out after 2 years. Most slips ons are fine without tuning as long as the cat is left in place.

[@taiwanreef]

The CFR mufflers have a louvered baffle in front and the rest going back to the end is a perforated baffle , how good do these perform?

[@jne232]

Watching this over two years later and realizing that H-D moved the catalytic convertor to inside the slip on mufflers on the 2021 softail street bob.....oh my...

[@raypack5349]

Hey Kevin new here I am going with the redshift 468 cam, power vision tuner the s&s cam plate and oil pump. I have neighborhater slip on with the stock header pipe and planning to stay with that setup. Any advice on this setup.

[@kevincollins9731]

Hey great video and channel. What is your opinion on short 2in2 exhaust on a 96” motor

[@mikemurehead2518]

Can short big radius true dual drag pipes with no baffles on a woods 555 camed 07 96ci twin cam cause front cylinder to run hotter than rear cyl and also cause excessive blowby with excessive oil misting? I have power vision basic and have done many autotune rides.

[@silviusbuturuga623]

Really appreciate the knowledge one question pls Have a 21 lowrider s I put on a bassani road rage 3 seems to run spot on better then stock have 1300 miles spark plugs look good I ride low 3 to 4 rpm no tune yet because of H-D factory for 21 models. is this hurting the bike? If so what do you recommend I’m out of Lawrenceville will be stopping by sometime.

[@kevinashleylewis]

Hey Kevin! Greetings from the ATL Southside! Great video! You mentioned 2-1 vs true duals. Where do the 2-1-2 systems fall? Are they a good compromise between the two? In the automotive world, x-pipes and h-pipes are where is at. Does this carry over into the M8 V-Twin world?

[@KevinBaxter]

I would say exactly that...a great compromise. Similar to H and X pipes used on hotrods.

[@AGK904]

Kevin, thank you much for sharing your knowledge. I find your videos very helpful! If I may, I'd like to ask somewhat of a specific question about your experience with Thunderheader on M8s. I know you typically stay from commenting on brands, but a general overview may help me make a decision. I have a 2019, 107ci, M8 on which I'd like to improve low-mid torque. I'm planning to install a cam that focuses on low-end torque and wonder how you think this pipe fits my goal.

[@KevinBaxter]

Cam and pipe has a huge effect on M8. Far more than TC. I have a great cam that would max low end torque. As for the exhaust...I have not personally tuned an M8 with a thunder header so i cant offer an opinion. I have installed amd tuned many with D&D billetcats with great success. If youd like to give me a call on Tuesday, i could get you set up after a few more questions.

[@cizzle1581]

Kevin Baxter Which cam with that pipe would u go with for the great low torque. I have the same 107 in motor on a 20 RG

[@Darbre56]

I agree with slip ons not voiding the warranty. But I've been told by many different people that if you change the header, and air cleaner you will need a tune, and when you install an NON-HD tune that will void the warranty. Tuner is a Power Vision. Is that not true?

[@BFG100K]

Dear Kevin, You mentioned the importance of cylinder head temperature. What temp would you consider safe maximum or normal for a Sportster? Thanks!

[@KevinBaxter]

I shoot for 300 degrees give or take a few.

[@Twk888]

Does 2 into 1 give you more horse power verses true duals on a bagger 107

[@brianhelgerson3870]

Hi Kevin, i realize this was done 3 yrs ago, but in 2020-2021 are you still seeing stock M8 valve issues? Im scheduled for my 122 SE kit next week, and wondering if the SE ported heads are worth buying as an add on in lieu of keeping the stockers or are they sketchy too? Should I keep my stock heads and send them out to a reputable shop for valve service and porting ? Thanks

[@jamesscott5073]

Kevin, at sometime, can you comment on the Harley warranty, when you install a trailer hitch and trailer wiring, to pull a trailer. Lots of comments on Harley voiding the warranty on your bike. Many dealers have different opinions on this. Some will note it on your bike profile when they see a hitch on the bike. I have a 2019 Ultra with an extended warranty, but have decided to buy a camper trailer.

[@KevinBaxter]

see a latest live video we did about our new warranty program. posted about 4 weeks ago.

[@hotrodharley891]

Have you done a comparison of two one and true duals?

[@gregt4270]

Enjoy your videos very much, I only wish I had discovered them sooner. Any opinion on torque inserts or lolly pops to control reversion? Are any good or a cheap band aide for a poor muffler or baffle? Thanks again

[@tomb.8485]

I would like to know also.

[@taiwanreef]

What brand was the muffler with the louvered baffle?

[@frankpellegrino7448]

The warranty regarding exhaust may very well be due to a lawsuit brought against Harley Davidson by the EPA regarding race tuners and stages advertised as for “off road use only” being done by the dealerships, leaving the bikes as non compliant with EPA regulations. Harley settled the suit for $25 million dollars. I personally have had many mods done by the dealerships over the years with no problems but no longer. In recent years I have been told that they would only install Harley Davidson pipes, air filters or tuners that are EPA compliant and that any other products used would indeed void the warranty. My current 2020 FLHC has the cats in the mufflers so it’s street cannons or nothing. Or I can just wait until the warranty is up and do the upgrades at that time.

[@michaelbishop3701]

You are such a wealth of knowledge. How do you fit all that in one brain? Amazing. I live next to Winder Airport. I would like to come and meet you some day. I have a 2001 Heritage, twin cam 88-B. Vance and Hines Longshots, no baffles. I installed torque cones and that made a huge difference in power. I was hoping that that the cones would counteract the reversion in the straight pipes. Pretty sure it did. Still curious if a tune is necessary. Hope to see you soon. Just picked up cam chain tensioners. 38,000 mi. Good thing I looked. She needs them. When I get them installed, I will come by and, hopefully, meet you in person. That would really make my day. Enjoy the Captain and coke. I am indulging in Kentucky Bourbon and coke. But, I like them both. Have a great day, brother.

[@KevinBaxter]

Sure..come by anytime. Thanks!

[@vf12497439]

A local dealer will alert corporate if you install slip on mufflers. The next dealer up the road will take care of you so long as you bring it into them.

[@gmtech2012]

My only question or concern is, how do you actually know if a certain head pipe or a certain set of slip ons is going to give the engine what it needs best? Other than just trying something out, I don't understand.

[@davehardan8323]

Kevin talking about reversion, what do you think about well designed lollipops?

[@jerrysmith2793]

i have short shots on my street bob with no catalic convetor will it hurt my bike

[@joeknight999]

what do you think of the old cycle shack 2 into 1 pipe?? Thx

[@bodeine454]

We bought an '05 Dyna Wide Glide EFI last year which has about 24,000 miles on it now and it already had V&H Bigshots (double barrel) exhaust on it without any baffles. The engine is factory stock as far as I know but I'd like to install some baffles to at least allow the engine to run the way it's supposed to and gain back some of the low and mid range torque if not make it quieter. From what I've seen and read there's not much someone can do to make these pipes much less loud and I've heard for years that they are not very well tuned for good engine performance because the pipes aren't equal length although I really do like the way they sound. Also I'd like to get you're opinion on torque cones, I've read that they do absolutely nothing for performance, not sure if they effect sound any but I've been contemplating getting some, still on the fence about it though. Thanks and thanks for the videos, newly subscribed.

[@KevinBaxter]

you are correct...get those baffles back in there. will help tremendously. Torque cones work at times, others they dont. Hard to say really. I've used in some builds, and they KILLED the power...like towing an anchor. Others, helped a little. For a smaller engine, they are probably ok. Some go in the head, others in the pipe at the muffler. That can make a difference too. Youre welcome...thanks for the sub!

[@bodeine454]

@@KevinBaxter Great, thank you!

[@KevinBaxter]

youre welcome.

[@jmc2567]

We only have about one poisonous spider but you never see it very rarely,it only hangd out in old wood and things ,I have never seen one,our big Harleys dealer here is called amps, Auckland motor and power sports , as you may know, I think,a guy called Ray Pratt he's been around a long time,drag raced a few bikes,and owned a few various shops this is probably his flashiest one ,bikes and parts and hot rod cars and parts are vary expensive here ,as harley is anyway,quite a few people going to victory and indian,spose you get expense living at the bottom of the planet so far away from any thing anyway...there are other harley shops down country can't recall what they are called have,t been down there for a while,once covid over will get to do a bit of a tiki tour as they call it...people here are friendly and welcoming ,places like Queenstown are awesome in summer...hope to see you here some time...cheers...

[@taiwanreef]

WHAT BRAND WAS THE MUFFLER WITH THE LOUVRED BAFFLE ?

[@craigpennington1251]

What about putting on open exhaust from the heads on back. NO CATS, MUFFLERS & OR BAFFLES ?

[@mohalsheik]

Can you please give us the youtube page for scoot who fix the vrod biket ... thanks

[@rayowens4355]

What should the head temp be on aa Victory?

[@tomhall7223]

How about removing Mufflers that have the cat in them how does that affect warranty?

[@marknegro8264]

Just bought 2020 street glide Harley said that if they used anything other than a screaming eagle tuner the ECU would send Corp a message and they would immediately cancel my warranty did a stage 2 performance but they used a 2017 tuner bike runs good one day and poorly the next stumped

[@umpatas5468]

What mpg should a sportster 1200c get then?

[@hookdog8640]

Stock 103 street glide stage 1 HD tune, 4" Vance & Hines Round. What exuast do you recommend to run for stock and will work for a stage 2 cam in the future for low to mid range power.using only a HD stock stage 2 tune. (Daul exuast) I travel back roads and mountain. Live in Los Angeles thru out the United States.

[@eurekadronebiker8230]

Thrashin supply anti reversion exhaust with the dog ball baffle? Any opinion on it? Great video. Always like learning something from you.

[@KevinBaxter]

not familiar with that one. Thanks! Appreciate it.

[@mikehenthorn79]

What is the exhaust he showed 3rd?

[@jeremiahmccarthy5990]

I have Harley Davison M8 119 With 4.115 Big bore forged 11.0:1 High compression pistons and rings SE8-447 torque cam If I remove cat will I damage motor

[@kevingirard924]

I have a 2020 road glide special, I just ordered V&H pipes and tab zombie slip ons .. I just liked the sound ! I am not after #s .. Hp or touqe , I like the bike the way it is but like it load . Is this kinda still achievable whit this set up ?

[@KevinBaxter]

sure. so much of the mc experience is how you like the look and sound of an exhaust. with a proper tune im sure itll be just fine.

[@michaelbarras6950]

All good stuff! That Supertrapp Supermegg 2 into 1 exhaust is like the best exhaust I put on my bike! People have to have that loud factor! BAD CHOICE! I need the performance factor! (Supertrapp gives that low end torque.) Hell with the loud thing! That just blows out eardrums! lol At one time I ran Vance and Hines Straight Shots. Never again. SUPERTRAPP made a believer out of me!

[@KevinBaxter]

Great comments. Thanks for contributing.

[@gunnyakam.a.c6670]

If you install yourself and use a screaming eagle tuner and Vance hinds big radius? Is warranty history?

[@davidfrench9675]

Hi K.B. Just came across your channel. I bought a 2022 hair tume too heritage softdale classic and took off the slip ones and added neighborhooders now Harley dealership is saying the catalytic converter is in the slip on part of that factory muffler. And he says if I don't use a catalytic converter I will void the warranty ? Can you tell me if there's any truth to this. I know this video came out a couple of years ago but I'm open you see this comment or someone does and can tell me

[@terryclark2638]

So what brands of exhaust do you recommend?