I've fitted a STI backbox to my 01 WRX and although it looks better than the twin standard it sounds the same - if i fitted a straight through center pipe would this make much difference to sound and power?

cheers

 

Vey little difference indeed. Not worth the hassle or cost imho..

 

I think its the removal of the downpipe with the CAT which gives you the power and noise!!

Andy

 

Prezactly...