Anybody build there own exhaust using these?

[Mrturner1]

Do these things work pretty good? No leaks or anything bad like that? I'm putting together a new exhaust for my truck to replace the old 2 1/4" that's on it now

[Mrturner1]

Pic

[BrianG]

My 2006 GMC Envoy has one of those on it. It's been good for 200,000 miles.

[Grandpa54]

Yes

[Boyd67]

I had about a $900 exhaust on my SRT4 and after about a year the flex pipe started tearing which of course caused a exhaust leak. I'm not saying yours automatically will but they do tear. So good luck my man

[Gmc.guy]

Brand quality may differ. I have seen one on a stationary Cummins with a solid mounted vertical stack on a sawmill. Must have been 4 or 5". I noticed it shaking into a Z shape at idle and a good bend at balls out. Can't say much for how long it lasted but definitely high abuse for sure

[Mrturner1]

Originally Posted by Boyd67

I had about a $900 exhaust on my SRT4 and after about a year the flex pipe started tearing which of course caused a exhaust leak. I'm not saying yours automatically will but they do tear. So good luck my man

This is what I was expecting because the thing is almost too good to be true lol

[scooterpimp]

Used one on my work car to replace the factory pipe was $171.00 or buy flex joint & cut & weld in for $24.00. Guess which one i chose to do...still good after 6 months & 14k. Miles...they have these @advanced , auto zone etc.

[Grumpy old man]

Where would you need to use these on your exhaust ?

[biketopia]

Originally Posted by Grumpy old man

Where would you need to use these on your exhaust ?

Yea you shouldn't need a flex pipe in your system, rubber mounts on your hangers and you're good to roll.

[midniteblues]

They are not a bad idea,certainly not nessacary.
I'm sure they will help too keep those header bolts good and tite.
Quality matters here.

I had bought two when I built my exhaust since my headers exit at slightly weird angles I figured these would help with that.
But I didn't end up using them anyway and returned them.
They were store brand like walker or something and not good quality either.

[72kool]

as others have said, brand quality makes the biggest difference in how long they last. While you can use them in your exhaust system, im not sure the need you would have for them on your truck. the reason they exist and are used is for side mounted engines on fwd vehicles. the idea is that engines rock side to side under acceleration and a solid exhaust system would break over time or the first time you floored it depending on the vehicle. These flex pipes allow the engine to move while limiting movement of the exhaust system. On a rear wheel drive vehicle like our trucks, rubber lined steel hangers are more than efficient in allowing the needed flexibility.

[72kool]

https://www.summitracing.com/parts/wlk-36516/overview/


theses are what i recommend for exhaust hangers. they have a clean look to the system without a bunch of pipe clamps at every one, and last the longest in my experience. this is all i like to use on all the custom exhaust i do in my shop. all while providing proper movement for the system

[Mrturner1]

Originally Posted by Grumpy old man

Where would you need to use these on your exhaust ?

I'm planning for 3" and I'm not sure really how I'm going to route it yet. I was thinking of cutting a hole in the crossmember to keep the pipes high up off the ground but I don't know how I feel about that yet

[Grumpy old man]

3" is too much try 2 1/2 , lots of guys cut thru the cross member

[72kool]

Building your own exaust can be a lot of fun and rewarding. There are a lot of different options on how to route it on these trucks depending on what drivetrain you have. Before you decide what your going to do, I would evaluate everything to make sure you get the most from your exhaust. What engine do you have? What is your goal for this project? 3 inch may be too big and disappoint you.

[Mrturner1]

Originally Posted by 72kool

Building your own exaust can be a lot of fun and rewarding. There are a lot of different options on how to route it on these trucks depending on what drivetrain you have. Before you decide what your going to do, I would evaluate everything to make sure you get the most from your exhaust. What engine do you have? What is your goal for this project? 3 inch may be too big and disappoint you.

It's a 70' c10 LWB, lowered just an inch or two but may go lower later. 10-1 355cid big cam (comp 280H) big stall (3000), th400 and 3.73 mini spool, Holley 750 DP, basically a fun truck to roast tire in when I get home from work on the weekends, and one day when I feel that the suspension and brakes are safe enough I'll take it to the track. Ultimate goal is to get her into the 12's, I'd be a real happy camper if I did that!

Watched quite a few dyno tests and all they changed was the pipes, 2.25" lost some top end to the 2.5" and 3". The 2.5" and 3" performed almost exactly the same except the 3" made a few more ponies waaaay up top. The 3" did not loose ANY low-mid range to either the 2.5" or 2.25". All this was done on a 400hp 9.5-1 383 stroker

I'm real tempted to build an X-pipe too, saw some great results from those on SBC's

[MikeB]

Originally Posted by Mrturner1

The 3" did not loose ANY low-mid range to either the 2.5" or 2.25".

Probably because the best exhaust pipe you can have behind long tube headers is NONE.

[Billhilly]

Yes. I put them right behind the headers, mine are about 7" long on a 2 1/2" pipe set up. I've only done about 4500 miles, but so far so good. Lots of modern cars/trucks have them. Hoping to isolate the headers from any excessive loads.

[MikeB]

Originally Posted by Billhilly

I put them right behind the headers, mine are about 7" long on a 2 1/2" pipe set up. I've only done about 4500 miles, but so far so good. Lots of modern cars/trucks have them. Hoping to isolate the headers from any excessive loads.

Good idea. Nice chassis.

[Gmc.guy]

I think that red cherry bomb dodge that was on Gears, or maybe Trucks? Had them on each side but I think it was to make them huge pipes shake on each side that stuck out by the steps