I already have a freeflow downpipe from zerosports, fitted in japland, but have bought a straight through centre pipe and want to fit this without changing from the original backbox. Will this give any difference in power and will the noise be worse. I really dont want more noise, its sounds like a friggin jet engine already!!


Its a 97 WRX with a centre cat.

 

It will give alittle more BHP. A full decat will add about 30bhp in total. The exhaust will probably sound somewhat deeper when you add the decat centre rather then louder.

smurfy.