Rebuilding the WORST exhaust I've seen with Stainless Mandrel Bends: Jeep Comanche MJ

[@benjaminreinhardt259]

Has been discussed on the forums and general consensus is the dent is factory. It is clearance for the front driveshaft. Every XJ I have crawled under has it.

[@kevinwiebe4136]

As for the ultra quiet resonator. Correct me if I'm wrong but is that not a catalytic converter?

[@NightWrencher]

Shhhh.... its illegal to remove cats. So thats not a cat, thats a resonator.

[@speedwack]

It's the same thing

[@dakotacastrechino9180]

Pretty sure some states don't care if you chop cats off

[@erichildreth7562]

I really enjoy watching you build a better exhaust system, you have a knack for making it bigger, better and flow for more performance!! It hugs the chassy and it is designed right!! Can't wait to see it all done and I bet this Jeep will gain a few ponies in the process! Thanks for sharing with us!!

[@Sabessuspensionz]

“You vs the guy she told you no to worry about” that gave me a good laugh 🤣

[@jakediesel909]

Me too! 🤣🤣🤣

[@loganshotrod4x464]

Clean work Homie! Feels good to know & see that I’m not the only guy who takes pride in his work! 👍😎🤘

[@justinvanburen8259]

Looking great!! I love the new music during time lapse!!

[@teaguegearhart9851]

Exhaust videos are where I am definitely finding I have a lot of learning to do. Thanks LT.

[@ValarAmstaffs]

This exhaust system is turning out great. Definitely an upgrade from the previous system. I’m looking forward to seeing the finished product. Keep up the great work LT.

[@radomark408]

I've always loved the Magnaflow 14419 or 14159 race round body mufflers. All stainless, straight through, and sounds aggressive.

[@AP9311]

Wow, LT, that is so clean and more square and cleaner bends and more professional looking, excellent video! Many many thumbs up!! Outstanding job as always. Thanks for the video! Looking forward to next one :)

[@2000S10V6]

LT, I wish I could have you work on my truck! Your attention to detail is amazing!

[@joevanvalkenburg]

I commented on Engine Masters @ the collecter there's a vacuum pulse that sucks though the bent header too maintain almost the same flow as before it was bent in.

[@ronniecardy]

Big improvement

[@TheBeerBox80]

Wow, that original exhaust... just wow. That is something else. Now it looks like art work.

[@SurlyMike]

Thanks for sharing the parts info. That's gonna be the nicest part under that rig when you are done.

[@LawrenceTolman]

Hope so!

[@WBOS72]

Excellent video LT - always look forward to seeing what you come up with.

[@gregquante8864]

Love your attention to detail on everything, especially exhaust

[@johnsmith-qz4bv]

nice work..i like flowmaster hushpower mufflers...

[@maxwolthuis]

I love watching your wedding videos! Always comes out so clean 👌

[@chrisgodinez2568]

Man that looks awesome! I wish someone mass produced this type of intermediate pipe for a Jeep XJ. The only thing available on the market is a aluminized non-mandrel bent piece. Like your channel keep it up.

[@TeamTopKick]

Looks pretty damn good. Cant wait to see the whole finished exhaust.

[@klumsytone]

Looks amazing, bro!

[@jeepfanatik1304]

Dang that's beautiful! I've got an 88 Manche that i'm restoring and wish i lived closer......would love to have that nice of an exhaust.

[@diggindiggenit6540]

I like the welding helmet and welding, the hair cut and the finished job well done.

[@Wgglewrm]

I used a borla pro xs. It's an amazing sound. Once you get to 3k it opens up and starts to rumble.

[@ericavazos1979]

Good content just a 🤏question. Do you back purge the exhaust at all or does it not make enough of a difference to worry about it on exhaust?

[@LawrenceTolman]

usually the only time I back purge is on a pre-turbo pipe where I need to make sure its extra clean inside... for regular exhaust I usually never back purge because of the added expense, and I don't see a huge benefit

[@cablenowadays6586]

The smashed sections are mandatory. When i first did my lift my front drive abashed sandwich my down pipe. Then i had a a stick get sucked up there and smash it even more. Ended up cracking the pipe and replacing it.

[@forreststrong797]

That exhaust looks super nice!

[@LawrenceTolman]

thanks! it was a fun one to build

[@brianmallcom260]

Nice work!

[@Todd_S]

That new exhaust system looks nice!

[@Mattmazz77]

I hear you on the oem hangers, but on the other 2 styles just because they have bolt holes that doesn't mean that they can't be welded in. I've done it plenty and haven't had any issues.

[@LawrenceTolman]

true, you can weld those as well...

[@dbrandon4528]

I have always had too much drone from the magnaflows.plus they are still glass packs so they change sound over time. Flow master and other chambered mufflers are really the way to go.

[@1slow5point0]

Looks much better than before.

[@EricErnst]

I've heard that 1in² of exhaust pipe flows 115cfm and that you should shoot for 2.2cfm of flow per hp. By that formula, 2.25" pipe should support 207hp and 2" pipe should support 164hp. You should try to be as close to your actual flywheel power as possible to keep the velocity high but not restrict flow. If you go smaller, it will raise torque below the peak torque rpm but if you go bigger, it will raise torque above your peak torque rpm. I've also heard that mandrel bends don't seem to help and bashing header tubes doesn't make a difference either but I'm like you and would rather keep the diameter consistent. The Magnaflow straight-through muffler design should flow marginally as good as a straight pipe. I know it's not really feasible to dyno it before and after, but I'm sure you gained power and throttle response compared to the existing system. Love the content. Keep up the good work. I got my ugly shirt this week. Love it. Onward and upward to 100k!

[@EricErnst]

As far as muffler choice goes, I'm a fan of Magnaflow. On my pickup, I'm currently running a resonator designed for a semi. It's 5"ID X 9" long. I use bell adapters to go from 4" to 5" and back down to 4". I'm using a 4" diesel system from Diamond Eye Performance for my little 350. The bends were already made for my body style. $250. I built my own 3" pipes before the 3-4 Flowmaster y pipe and ran the 4" system after that.

[@torind2000]

@LT you use that chop saw enough you should build a nice stand for it.

[@jordanthornton4803]

I could be wrong but at 22:37 it looks like the oil pan bolt next to the exhaust is loose

[@LawrenceTolman]

you're not wrong, good eye! that's the bolt that holds the wire clamp for the o2 sensor thats not in yet...

[@4BillC]

I've been slowly piecing together a new exhaust system on my car. I did the rear half so far while I have the rear axle out, it doesn't look nearly as nice as yours but I also don't have but a few months of self taught welding experience with flux core! I'll do the front half when I put the bigger turbo on. I need a better (TIG) welder!

[@6.SlowSilverado]

I know this is hasent been talked about or is even relevant but whats your thought on the 72-93 d150s they are starting to get more popular and i have had mine almost a year and im its in a process of being built but i would love to see what your do with one if you like them

[@IBEDAVE87]

That looks heaps better. Only one thing I'd note here. The clearance to the trans pan might be a bit tight. Unless SS has a lower heat transfer that I'm not thinking about. Couldn't you wrap that front section in the fiberglass wrap to try and keep heat away from it? Or maybe make an aluminum heat shield to block the heat transfer?

[@georgecerda7802]

Welding those flex couplers is a trick. I use 1/8" rod and lots of foot pedal.

[@LawrenceTolman]

i found it was easiest to fuse the two layers of the flex coupler together first to make a thicker area to weld to, and then weld that to the pipe. seemed to make a cleaner result.

[@joshuacagle9958]

Looks good

[@UcantBeSerious03]

20:36 personal experience? lol nice job on the fab work

[@mikejackman4416]

Nice work,,,,just waiting for the keyboard welders coming in to tell you you need to back purge your welds

[@93xcr440]

I know flowmasters aren't the greatest flowing muffler but they sound great I mean think of a Fox body 5.0 you could tell what it was way before you could see it

[@krnwhitlow]

madd skillz LT is there any way to upgrade a gm 8.25 IFS with a limited slip or spartin locker ?? keep those videos coming...

[@jeffwooton7138]

Dynomax Ultra Flow, for performance, sound, and price. They are very hard to beat.

[@tpg_sethtomerlin]

A cheap band clamp with some slots or holes cut into makes for a a decent exhaust joint holding tool and you can tack through the holes. Js

[@LawrenceTolman]

I know, I need to get a setup like that

[@drew7767]

Looks great, looking forward to hearing it. i am curious how much time it takes to build single exhaust like that or dual exhaust, just a rough general idea?

[@sgtmiki_]

I like the Jones mufflers myself, I use them on almost all of my builds

[@myrondesjarlait9752]

Can you show a crossflow exhaust? Is it a better way to go?

[@jamesvanhoose3132]

Clayton off-road has an off-road muffler. I think it is 1/4 thick in the middle. I would love to see you "test"that one.

[@lunkydog]

On Engine Masters they were just denting primary tubes, not after the collector when it's dealing with all the cylinders and not just one.

[@EricErnst]

I think they recently did a mandrel vs crush bent test too. I don't recall the exact results, but mandrel didn't really seem worth the extra money at the 500hp level.

[@TheDevonwurz]

The exhaust was bashed in by the front drive shaft. Mine has a dent in the exhaust same place . Not so bad tho cuz I don't have long arms.

[@sdrKEL]

What kind of bench vise is that? Thanks

[@TheJesusno2]

Man dude you gotta get hose clamps and cut out some of the worm drive strips and clamp those fusion joints makes life way easier

[@LawrenceTolman]

good idea!

[@mikcun2799]

Seen the thumb and all I could think about is"this man needs a hat"

[@ericdolan2130]

5:50 If the quality don't hold it, the quantity will....I just cringe when I see welds like that. Looks like the Pigeons took roost.

[@king0cans]

What do you use to edit?

[@warrengreenley7689]

It is better looking the way that you had done it and has a lot more room from the ground!

[@anthonyzhang4918]

Yup those smashed bits are factory!

[@nicholasbaldwin1674]

Difference between a exhaust shop trying to make max profit and get a rig in and out without much time or material spent. And a KZbinr that has his angle finder and TIG torch out for every section of the exhaust. Did the other exhaust work? 99.9% honestly don't believe this made the .01 but just giving you the edge ;) This new exhaust is very well done and seems to be the nicest part on this whole rig LOL

[@adubbelde1]

Wish I knew how to TIG

[@blake8297]

For whatever reason, that smashed area was factory on XJ's. Idk about MJ's.

[@chazgeisler6213]

There was an oil pan bolt loose. Great exhaust work! I shot you a message on messenger, I am located in Utah and I would love to have your help fabing up some exhaust work on my 1987 turbo ls truck. Let me know!

[@timbowers1]

i like that straitpipes myself lol

[@whiskeytangomikefoxtrot1720]

Come on LT we want to hear it!!!!!!!

[@LawrenceTolman]

I'm working as fast as I can!

[@whiskeytangomikefoxtrot1720]

@@LawrenceTolman just giving you a hard time. Keep up the good work been a fan of yours for a while.

[@44Eflores]

Yes 100 better, no doubt! From my personal experience, I will that purging will make it 100 times better!

[@LawrenceTolman]

Yeah, I do need to get a better setup for purging

[@PrestonFarr]

I will have to send you some pictures of my 77' K20 exhaust lol its sooooo freakin rusty I grabbed it with my hand and it put holes >.

[@bobevans156]

It should have a Cat somewhere, Shouldn't it?

[@ralphhaldermanjr5926]

What's up brother

[@forchristsgloryamen858]

My exhaust is pretty bad as well.

[@bdugle1]

Just for the record, 2.25 is 26% bigger than 2”...

[@redman715]

Super 10s by Flowmaster

[@johnmirbach2338]

😁👍✌👌🖖😎

[@80sfordguy]

Nice video LT love the content and personally I subscribed to your channel right away after you quit PowerNationTV but, man chill with dogging out the lesser individuals than yourself. Most people aren’t trained by a tech school or have honed their skills before, during and after a fancy TV show. Not everybody is able to afford nice TIG or MIG welders to do sweet welds and afford nice stainless exhaust from Magnaflow. Some folks can’t do the welds and can’t afford the $400-$600 price tag for nice exhaust parts with sweet welds from a good welder. They’ve got to bring it to that guy they know that can literally stick it together on the cheap with rock autos best OEM parts. I’m tech school trained myself just as you were though my project car has rockauto’s best sized dual thrusher 2” mufflers, 2” H-Pipe with summits OEM style & quality dual 2” catalytic converters and rock auto’s OEM “over the rear axle” tail pipes. It’s both bolted together with 2” gasket-style flanges and slip-fit joints with standard 2” exhaust clamps. Why? Because, that’s what budget can afford right now. Welding it up properly I’ll do later along with v-bands and better quality performance exhaust parts as I can afford them. We all like your quality of work and your experience level too but, most of us can’t afford “nice” right now and have to deal with “alright that’ll work”. #pandemicsucksforthelittleguy

[@assaultlick2169]

Dogging some one out ? They were shite welds. Stop crying

[@80sfordguy]

@@assaultlick2169 wasn’t necessarily talking only about the welds sir, more so the whole exhaust. And seriously “crying” oh that hurt smh.

[@jakewade7388]

@@assaultlick2169 Yeah, shit welds that he probably paid big $ to have done.

[@dbrandon4528]

Engines don’t like back pressure. Period

[@fredproctor6973]

Pretty sure that's a catalytic converter

[@johnbarker5009]

That's...pretty bad!

[@devillenm5525]

Dude am i the only one who cant ever get through any more than like a few minutes of the videos on this channel? Every video is like 99.9% yapping of the gums and 0.1% content... That sounds mean... I dont mean to be. Im just saying. WAY too much talking in this channel. It's just not my style.