Exhaust Question.

[Staunch]

I've already tried many searches for this and no luck.

I've purchased a 3.5" exhaust for cheap which goes from the cat back. What are the differences between an exhaust from the cat back and turbo back? Sound, performance, maitenance etc. these things i would like some feedback on, thanks guys.

[sky20det]

well.. im not too sure what size the standard turbo back (dump) pipe is.. but it will give better performace if you get a larger dump pipe..

think about it as you have a large 3.5" cat-back system, the exhaust from the turbo still must squeeze though the standard dump pipe before reaching the 3.5" pipe after the cat. it kinda defeats the whole purpose..

better to go and get a bigger dump pipe and hi-flow cat then your car will be able to breathe better

[race_snooze]

stock dump is 3" then down to 2.5" for cat so get a high flow cat and 3" to 4" exhaust.

[Staunch]

ahh so there are the sizes thanks for that snooze. yep makes sense just to high flow the cat. 3" to 3.5" isn't too bad, should suffice.

[Staunch]

here we go making use of the same thread! haha, another question. Is it possible to equip a split dump onto my sky (stock turbo and all)? Why is a split dump preferred over an open dump? I'm assuming performance? I heard it sounds divine

[Staunch]

Nevermind that I did some browsing and found my answer. Bought a 3" split/front dump pipe and 3" catco cat from BATMBL (excellent service there btw), surely the 3" cat can be connected to the 3.5" exhaust?