View Full Version : Exhaust gains?

08-05-2007, 09:57 PM
Ok, I want to do an exhaust on my car but don't want to spend the cash for the full system. Would there be any benifits from a gutted cat and a flowmaster 40 series? Will it be rediculously loud and shit sounding?

Also, what is the piping size at the muffler?

Are there multiple cats on the 325e?

08-06-2007, 09:45 AM
there is one cat on a 325 e.. but usually has 2 mufflers.. my exhaust is a supersprint muffler and a magnaflow high flow cat.. with 2 1/4" inch stainless it sounds great

08-06-2007, 09:57 AM
Is there 2 mufflers or a resonator and a muffler?

08-06-2007, 10:18 AM
well its a resonater and a muffler but the resonator looks like a mini muffler lol i never put a resonater back in i just went cat strait 2 1/4'' to the sprint..

08-06-2007, 10:47 AM
Cat is gutted and following that I have the pipe upped to 2.5".

No resonator either that's gone, all the way back to a flowmaster 60.

The 40 might be too big, i'd suggest the 60 it's loud and aggressive enough trust me.

I just need to get my pipe refit, the idiots who did it, have it hanging too low and it scrapes sometimes, being the lowest part on my car.


08-06-2007, 02:25 PM
When I change my clutch i'll take a look at it, I might justy gut the cat, keep the resonator and put a 40 series on it. 40 series is a 2.25" I believe. What is the factory piping?

08-06-2007, 02:30 PM
i think stock is 2 inch but not positive