I have been thinking of going for the muffler delete pipe from RPM and using a drop in after market filter.
How many of you guys have the delete pipe / straight pipe mod?
Would you reccomend it?
I am wanting to try this and if I don't like it I will get the trusty Aero.
Any and all advise appreciated.
TKS.

 

Straight pipe 4" turbo back- next weekend 5" from downpipe back. It is a little loud if your coming straight out the side. It's perfect if it is angle back or straight back

 

be prepared for a drop in low end torque & mileage... especially with a 5" exhaust... talk to Bemkin (sp?)

 

Naw steve, I'm adding an aero muffler to get to where I was with 4" straight pipe

 

OK, let us know how it goes...

 

I'm betting I'll light myself on fire (welding it together)

 

I am heading towards the Aero 4040XL myself. Heard one the other day and it sounds nice.

 

Due to having a turbocharger, the normal rules of exhaust do not apply. The turbo gives the engine all the backpressure (and then some) that it needs to operate correctly. There should be no adverse change in power anywhere in the rev range by increasing exhaust size. If the 4" is doing an adequate job then you will not see a benefit and indeed be wasting money.

C6

 

i have a straight 4" from the turbo back and i love it. It is loud as hell when you are hammering it, but i want to be noticed. I didn't notice any performance difference other than the turbo seems to spool a tad quicker.

 

Welcome to df Cowboy6...

from my experience on 3 differenct setups on my '05, when you open up the exhaust your lowend power drops, add some backpressure into it and low end comes back up. what i've observed happening is that the low boost low end torque drops off, turbo spooling increases and egt's drop. if your on it hard, you'll blow right past the low end anyway. if your cruising down the hiway, you have low boost conditions & thus less low end power which will hurt your mileage. off the line performance in the city also hurts...