I was just wondering what kind of X-pipe should I run on my 04 SCSB 5.3, I noticed that there are a few guys on here running a x pipe an so I was just wondering what brand of x pipe are yall running or what kind do yall prefer? An how much are they an where can I find one? An I was also wondering if the x pipe really helps restore the lost back pressure if I true dual it?

 

backpressure = bad. i think the best one is magnaflows x-pipe

 

you need to have some backpressure, otherwise you'd lose all your low-end torque.

 

Yes, you need backpressure, especally on a truck.

 

yup yup

 

I 've got the magnaflow and I think it's great, Just switched my exhaust this weekend and love it, it now is alot cleaner and runs smoother but is loud as hell with alot of deep bass. But that is the way I like it.

 

[stirring up the pot] Backpressure is not needed as long as your engine and tuning is setup for a less restrictive exhaust.

Anyone gonna bite?[/sitrring]

 

stock vehicles only have 1-2 psi backpressure at 2000 rpm, you do not need back pressure to build torque, go here and read about exhaust tech, http://proficientperformance.com/tech_back_pressure.htm
it says :The standard for exhaust diameter is to not run too large of exhaust, for the engine needs a certain amount of backpressure. This is correct in the sense of one should not run too large of diameter exhaust tubing, but the statement of the engine needing backpressure is not. You need to have the least amount of backpressure possible to produce maximum power. Too large of diameter exhaust will cause a power loss and loss of low end torque because a larger pipe has less exhaust stream velocity than a smaller pipe. If the exhaust pipe is too large, then the exhaust flow will be slowed with less velocity.

 

So what is to large on our stock trucks, I ran true duals 2.5 right off my headers, so I am guessing if you go up to a 3 inch that is probably to big.

 

2.5 should be the best size. are yo still runing 40 series flows?