The baffling Harley davidson exhaust saga.

[@Big88Country]

To get that deep low down rumble you usually need pipes with bigger diameter, I just put a set of 4.5 inch TAB slip Ons on my M8 and the sound is much, MUCH better. I also removed the cat, which to me is a MUST! The M8 is never gonna sound as good as your Twin Cam, but these TABS get me closer! My biggest problem is explaining to the wife why I NEEDED these pipes! LOL!! Loud pipes save lives, right! YES!!! Beautiful Bike Brother!

[@AeroplaneHeaven]

haha they may save lives but it seems they ruin marriages ? :D the best idea I have had is I simply need a second bike. A shovel or a panhead. to get that sound I want. The M8 though gets super close to the sound. Ridden with some fellas with M8 and they have the rumble.

[@Big88Country]

@@AeroplaneHeaven Yea Brother!

[@vf12497439]

I'm running tab 2-1-2 headers with the tab 50 cal mufflers with zombie baffles. My M8 114 is as loud as an evolution with drag pipes. My oldest son rides some hondasaki 900 something or another with a yoshi exhaust.... we went thru a tunnel and I grabbed a couple gears. My son said later that it's pretty bad that he was bouncing his rev limiter and couldn't hear his own bike because his dad's geezer glide was so loud that he probably can't have children now😂

[@BikesnBBQ]

Lots of cool research. DK customs makes some quality stuff. So, I have a 2012 Street Bob with the 96ci. I am convinced that the best sounding exhaust is the ThunderHeader or in Australia the RedThunder or something like that for Twin Cam engines. The only way we could really get that authentic Potato-Potato sound is get a Shovel Head. Aloha 🍍

[@bill392]

For the past few years, I've been considering buying a new or newish Heritage because it would be better on the highway than my Sportster. Every time I think about trading in my Sportster, I know that the dealership wouldn't even come close to giving me what's it's worth and I know that leaving it behind would just break my heart. Regardless of if I ever buy another bike, my Sportster is staying with me. It was my first HD bike and I just can't bear the thought of it being with anyone else.

[@theobviouschicken]

i hear you there . I think a sporty + big twin is the perfect mix will be chopping the sporty though. Thanks for watching.

[@garyhopkins6337]

I made a set of them a while ago for my 82 Shovel with 1 3/4 pipes, they worked ok for a short time but then they ripped the mounting holes and even lost one so I shoved in a set of torque cones and they work a treat. In the early days, there was another trick with just a bolt and nut and you just experiment with size to get the sound you want but in later years EVO and up you will never get that sound

[@theobviouschicken]

Turned them around to 45 degrees and that seems to be the sweet spot. I reckon these. Will get more for the second bike when that arrives. Probably/hopefully a shovel actually.

[@marcmo7138]

The baggers utilize a much bigger slip on diameter. A twin cam 96 bagger will sound much different than your bike because of this.

[@anonymity6876]

Have you thought about Suppertrapp 2 into 1 exhaust?? I had on fitted to my 2006 Streetbob with 96 cub engine sounds great and has adjustable shims for future performance upgrades. Cheers 🤙😎🇦🇺

[@theobviouschicken]

Yes thought about it but I am a shallow slutty package I dont really like the look of the 2 into 1 exhausts. My go to aftermarket exhaust would be the vance and hines big radius but I need to go to forward controls over the footboards... and those footboards are magnificent ! I have now got the bug with older harleys/triumphs so not really worried about the sound any more on the twincam in fact I am thinking of inserting the baffles back in ! not entirely sure. Thanks for watching though.

[@anonymity6876]

👍​Fair enough, all the best on your journey. Cheers 🤙😎🇦🇺​@@theobviouschicken

[@1kzrider]

Very nice bike. I would get the second like you said. I wouldn't let that beauty go.

[@theobviouschicken]

Oh I mean a second bike as well not replacement. I think most motorcyclists have a list of bikes they want. I'd kill for an 80's shovel or a classic muscle sports bike. but as well. This is my dream bike would have to be something very special to get me to sell this one that is for sure! Thanks for watching.

[@1kzrider]

@@theobviouschicken yea older I get the smaller lighter old school look I find more appealing.

[@jamescollins5073]

Nice scoot, it sounds pretty good to me, although my 21 bob has those thunder torque inserts in the stock slips with the baffles removed. The sound is a little throaty compared to what the V&H slips sound like but it'll do till I get around to getting the V&H.

[@thisfishsmellsgood4084]

Get it right it's a motorcycle it's not what little dorks ride

[@howardbull9001]

Great video of the ride. What camera setup do you use? There doesn't seem to be any discernable windnoise.

[@theobviouschicken]

Gopro hero 7 black , an iphone 5 headphone mic into a gopro microphone adapter. Simple and cheap. Looking to upgrade soon to either Dji action 4 or the new gopro 12 as the 7 lasts about 30 minutes per battery on 2.7k. Hope this helps and thanks for watching.

[@Rich..]

What a stunning machine

[@theobviouschicken]

thanks mate it's my first Harley and it's been great (well dyna issue aside )

[@oldasdihrt5993]

Did the thunder torques help with the decel pop ? Nice video

[@theobviouschicken]

Yes and no. Installing them 90 degrees as in the video reduced decel pop to nothing. However I wanted a little more bass to the sound so rotated them 45 degrees this added a decel pop but only if I do something stupid like changing down way too early at speed. I rate them make a good sound and my bum dyno thinks its added a HP or 2 . I also like decel pop. I dont understand peoples dislike of it. So wasnt phased if it returned.

[@theodavies8754]

I have a '99 TC88 FXDL with CV carb and the V&H straight shots slip ons with quite baffles. Super Q might be ok with standard cams and EFi but for anything with a bit more overlap and a CV they are a bad plan. I don't get why anyone makes their bike loud then wears earplugs for anything other than long trips at the same rev. I'd have a Vincent silver shadow parked in the house if money was no object.

[@bill392]

Here's a video by someone else, Adam Duguay, showing his V&H slips-on exhaust with the bike running, I'm sure either standard baffle or none. I thought you might like to hear it. kzbin.info/www/bejne/inbCp6yspKunqMk

[@fq7879]

U can also install them with the baffles u removed.

[@theobviouschicken]

Absolutely but suspect that might introduce too much back pressure. The only people that want to see that are my neighbours!

[@DKCustomProducts]

Thanks for your business, we appreciate it. Great video! 👍 Glad you are getting the bump in power you were looking for. Sorry the sound is not what you're wanting. Here is a video on that subject- kzbin.info/www/bejne/fmebYpeiZ72SnJY Also, here is the video you mentioned that you were wanting to link about exhaust myths on Harley's- kzbin.info/www/bejne/pqOZq2NmnLFoj8k

[@theobviouschicken]

Hey fellas. Been tweaking the angles of the inserts. ( which have stayed in and are going to continue to stay ) Way more happier. What I am thinking is the issue is I want a shovelhead sound from a twincam 96 stage 1 and it aint gonna happen without cams + full exhaust + possible big bore etc. or probably the more intelligent option is to buy a shovelhead. Keep making the cool stuff I regularly watch your videos.

[@DKCustomProducts]

@@theobviouschicken Good to know you're happy with them! Yeah, to get the old potato potato sound on a Twin Cam, going with some loping cams will get you closer. as will a tune that is rich at a lower idle. Big bore and full exhaust is unlikely to help. Enjoy your ride!

[@captmisha]

I used the two butterfly valves out of a Subaru forester. late 90's. I could manuallu adjust as needed and they fit with 4mm gap all-round when closed. A copper wanted to test my Superglide decibel reading. LOL I said I have to "close the valves" first,, oh! reading was less than a goldwing. I explained the law has NOT changed in Australia for HD and INDIAN, where "an EXHAUST valve be fitted for use in built up areas".....Some old rides still have the cable on the left side for these valves..

[@yoso585]

2 1/2 freedom performance independence longs with the standard baffles give you deep rumble, I can tell ya that.

[@yoso585]

But nothing wrong with the way your bike sounds. Wouldn’t spend another dime on pipes myself. Of course, unless they would make the bike a keeper.

[@theobviouschicken]

Reckon they would clear the footboards? Cant find any information on them I was looking at declarations as an option. And yes am thinking a full exhaust as here in Oz we have the active exhaust valve crap.

[@yoso585]

I couldn’t say. Mine came with a 2018 Heritage and they are snug as a button. As if they were made for it.

[@frankc3807]

Did you notice any change in performance?

[@theobviouschicken]

Sort of. There was a difference initially but like all things you get used to it. The lower end was a little stronger i suppose. I am sure there are gains on a dyno but basically the average bloke on the road isnt riding a dyno . I'not sure my butt dyno can feel the difference of 1 - 2 hp. The difference in tone was the key here. And really the only reason I installed them if I am brutally honest. The mod was cheap and easy to reverse if you dont like them. I will say The volume increase has become a problem . Might do a quick long term video with the pros and cons actually. Thanks for watching.

[@hurricane6014]

I see your problem. Harley’s were made to travel down the right side lane.lol

[@davidmurray9193]

I have a 2022 streetbob 114 with v&h big radius and wanted to remove the baffles but was told that will damage my engine after long time use, and loose back pressure (I'm keeping this bike as I'm in my 50s now) I was led to believe it I buy thunder city monster inserts they will keep the back pressure, give me the sound I'm after and not damage my engine long term, if I've been led to believe this is it right? My big issue is I live in the UK and been on the web site and messaged thunder city but had no reply and their out of stock of these baffles, do these do these baffles you used do the same as what I need? I'm looking for alternatives so I can reach my goal, any help would be cool

[@theobviouschicken]

I am just a bloke in australia but a couple of things stand out. First you are on a M8 engine with the 2022 ? totally different engine not saying it wont work but the M8 is in my opinion a better designed engine than the twin cam. That said dkcustoms has a huge amount of videos on back pressure and whether it is good or not. kzbin.info/www/bejne/o4uYZIyFlLeNZqc is one on the side that pops up right now for me. I would look into that they are the pro's. and where i got the torque inserts. Performance wise I am going to say a possible increase but I dont think you are going to notice it. If performance isnt your thing but the sound... well the M8 is a good engine to do that on. People have just been replacing the slip ons for something fatter and calling it done. For this actual application it's essentially a lollipop lady standing in the middle of the road ( exhaust ) letting cars go by angling her lollipop in a specific direction. You can have maximum back pressure by having them in the flow of the exhaust almost blocking the exhaust. or in line with the flow for less. I settled on a 3/4 open. However. For my twin cam... I need a set of bigger pipes to get that low rumble. I am definitely not unhappy with the sound. Just want that potatoe potato sound with a little less harsh top end and more low end. The big sweeper vance and hines exhausts make the sound I want. Just got to find where they are in stock in australia ! But dk customs are the people to check out. Esp with your big radius pipes you have.

[@davidmurray9193]

​@theobviouschicken nice one thanks for the reply, think I'll order a set later on, in know what your talking about on getting the exhaust it was a bloody nightmare getting them

[@RobertPicking-lt8cr]

Looking at your video you seem to have the thunder torques in the wrong way...the sculptured side is supposed to face towards the engine and the dish side towards the end....you may not be getting the best from them!You also don’t have to remove the baffles if you don’t want to.Just saying.....😊

[@theobviouschicken]

Hello Robert i had them the wrong way round. Have been playing with the best options and they are now not only the correct way but are now sitting at around 50 - 60 degrees perpendicular to the air flow. Seemed to be the best for me.

[@six-pack1332]

Sounds better.

[@frederickking1660]

American women prefer inches to centimeters.

[@AeroplaneHeaven]

😀 yeh but you get more with centimeters. 9 inches is 22 cm and you know bigger numbers is more ! thanks for watching !

[@veibz1279]

If you have to run away from fumes, your fuel mix is wrong.

[@AeroplaneHeaven]

I dont have to run away from fumes. Volume of the exhausts but fumes no.

[@jerrymasonmason3460]

She sounds better

[@socalfun64]

Idle is way too high

[@theobviouschicken]

Cold start. once warm the idle fluctuates between 950 and 1000 rpm. Thanks for watching

[@aurozappa305]

DK inserts create back pressure also ... Even race car engines needs a certain amount back pressure unless you are dumping a whole bunch of fuel for a short distance ! To run to run efficiently and optimal you need BP .

[@ArchimedeanEye]

Wrong. You want zero back pressure. Back pressure is restriction. Can you explain how a restriction in gas flow leads to improved efficiency and power. It doesn't. What you want is as close to zero back pressure as possible with good gas velocity with minimal reversion. This is not the same as back pressure. I promise you, if you read any scientific book or article on back pressure, it's not what you want in a 4 stroke engine.

[@aurozappa305]

You have no idea of what you are talking about .... try it and see how well your bike run without zero back pressure ... Just chop off your exhaust , you don't need it .@@ArchimedeanEye

[@horatio8764]

No back pressure , increase gas velocity, correct

[@alexanderrobinson7499]

Wrong. No motor needs back pressure. Reversion is the issue.

[@aurozappa305]

​@@alexanderrobinson7499 🤣.....

[@JohnJones-op8uf]

“Real Measurements” 🖕

[@orionclayton2478]

I can't find anyone that actually say these help with torque other than the two guys that sell these out of thier garage. Supposedly s and s did a dyno on these but I can't find a reason to believe that they didn't just tune a bike to show improvement. For anyone of you that don't know Harleys run like shit from the factory. And it is recommended that you get a tuner and throw it on a dyno to get the most out of your bike. Most of this due to California regulations. Easier to just tune them all the same instead of a special shipment to Cali. For all those claiming back pressure is needed, stop talking. Why do 6500hp dragsters run zoomies? Why don't they have mufflers? These are a gimmick, and this guy doesn't even mention the 20% torque increase the people claim these make from installing these. He basically just mumbles about the sound and seems to be all he's really concerned with. As well as any other video I can find on these. I've been trying to find videos actually talking about the performance improvement and it seems like everyone forgets about this part of the product.

[@theobviouschicken]

Thank you for insightful comment. Its been taken aboard in the same manner it was written.

[@bill392]

You have a nice bike there. Great colors. I have a nice '09 Sportster 1200 Custom (XL1200C). Here's my vid so you can hear what it sounds like... kzbin.info/www/bejne/rn7OgYd-gsemppo I put on V&H 3" Twin-Slash slip-ons with the quiet-baffles and I really love the sound and the power gain. Since my video, I've put on an Arlen Ness inverted high-flow air cleaner and a V&H FP3 tuner and I just love the result. The quiet baffles have a straight-thru path so they are not restrictive. There is wadding around the baffle. I enjoy the low rumble very much. The standard baffle sounds a little more harsh in the higher frequencies than the quiet baffles. The quiet baffles are only a couple dB quieter than the standard baffle so the difference in volume is hardly noticeable. The difference is that the quiet baffle has a more obvious lower pitch sound. If you haven't done so already, I recommend that you replace your stock rear shocks with something better such as a Progressive 412. I have those on my bike now and the ride is so much better, I couldn't believe the difference. I recently put on a Mustang solo seat and I really like it too, way better than any Harley seat. With all the mods, I feel like I have a new bike. The performance and ride quality is way better than factory.

[@theobviouschicken]

oddly enough I was looking at lowering the rear end for that sit down norcal look but its a hefty bike to do that style to it. Got the progressives on a list of things to do but got my eye on another bike before that! thanks for watching.

[@thisfishsmellsgood4084]

WARNING this guy Doesn't know much about exhaust systems. he doesn't know the difference between a muffler, Baffle or straight exhaust. Wow