Question about backpressure... kinda

[cj91legss]

So i picked up 3" turbo back from a local guy. The person that owned it before him cut the muffler off and the 3" pipe off at the axle. It's got a high flow cat and a resonator.

My curiousity is My stock exhaust has an aftermarket muffler on it made my RD Exhaust systems. I'm wondering if i cut this muffler off and welded a reducer on it and went 3" to the muffler from where the 3" exhaust i bought ends, will that weaken power? or will that little bit of back pressure be alright? Im not running any crazy horsepower, just getting ready to put a td04 in and then when i have the money get the revtronix stage 2.

Thanks in advance for opinions.

[93forestpearl]

The cat is more of a restriction than anything else in your exhaust system. Also, if the reducer has a smooth transition, the perforated inner tube of your resonator is more of a restriction than your transition to 2.5" pipe. The muffler, on the other hand, can be ok or not the greatest depending on it's design.



If you aren't going over a TD04, or even pushing a TD04 to it's limits, I wouldn't loose sleep over it.

[cj91legss]

I could never find any info on the muffler, ive never heard of it, so i honestly don't know if it's poorly built or not.

[evolutionmovement]

It's so far down from your engine and with so much other stuff in between that pulse reflection effects should be negligible. I don't think you'd notice any difference either way.

[cj91legss]

alright, cool. Thanks for the input