Generation IV External Engine - LS2 Exhaust Questions: X or H pipe, 2.5" or 3", etc




Rocketrod
12-30-2011, 04:53 PM
I am installing a stock 400HP LS2 and 4l70e trans out of a 2008 TBSS in my 69 Camaro. I have switched over to a corvette intake & TB with long tube headers with 3.73 gears.

- How important is the exhaust size? Would I be better off with 2.5" or 3"? H pipe or X pipe.
- What would you recommend for header gaskets?


Rocketrod
12-31-2011, 02:14 PM
anyone...

billetproof97'
01-01-2012, 11:09 PM
Imo id do 3 in and do a X pipe


Guitar
01-01-2012, 11:26 PM
2.5" won't restrict your power at all right now, but if you were to produce a large amount of power in the future, 3" would be your better bet. H pipe will sound more old school and deeper, while an X pipe will give a few more HP (most of the time unnoticeable) and a louder but...more unrefined I suppose sound.

redtan
01-04-2012, 11:08 AM
How important is the exhaust size? Would I be better off with 2.5" or 3"?

For stock and near stock power 2.5" is more then enough. If you plan on putting down 500+ hp then go with the 3".

H pipe or X pipe?

H sounds deeper and muscular like an old school V8, X sounds like a buzzing exotic european V8...your call as to what you want your 69 Camaro to sound like.

What would you recommend for header gaskets?

Go with OEM ones

SSCamaro99_3
01-04-2012, 01:15 PM
H sounds deeper and muscular like an old school V8, X sounds like a buzzing exotic european V8...your call as to what you want your 69 Camaro to sound like.


The pitch is higher, but it in no way replicates a flat plane crank engine.