I was just wondering if it's ok to remove the CAT's as well as the Silencer's? I have a 1990 TT, the reason i was asking cause i heard that i might not get enough back pressure for the turbos.

 

Any advice?

I was just wondering if it's ok to remove the CAT's as well as the Silencer's? I have a 1990 TT, the reason i was asking cause i heard that i might not get enough back pressure for the turbos.

 

Any advice?

 

Also i was wondering if anyone knows the diameter of exhast pipe i would need to weld in straight through's?

There's loads here on this. No back pressure means more oomph for the turbos but also more rapid rogering of the seals. So if its done a fair mileage you need to budget for new turbos much sooner. The bloke who had mine before me had 3.5" diameter straight thrus made up decat with Apexi cans on the end. Apparently it amplified the turbine sound and sounded like a 747 whine and was so loud inside as to be undriveable. The cats went back on and the exhaust was cut and modified to cat back. Now its still louder than I'd like but sounds great in tunnels.

Look at the poll Mac posted on this one matey ;)

Just found the link for ya http://www.300zx.co.uk/forums/showthread.php?t=37089

 

HTH