I'm look for a downpipe for my TII S5, what do u suggest?
I already have the HKS Hi-Power Dual exhaust, which has a small cat before it splits, so i'm not sure if i'll need the regular cat....
RX7.com sells this one: Bönez Turboflo System, which is a downpipe and a cat, but it's like $400...
HKS makes a downpipe too, it's about $300, but i think it get rids of the stock cat, but is it legal? it says it's off road use only....
really want to get this project done
any opinon welcome

thanks

 

http://www.thunderfabrications.com/