Help with my exhaust system!
 

Ahhhhh headaches, that's all i've gotten trying to make sense of it all. I own a "90 RX7 S5 turbo and my brain has been turnt to goo trying to work out what exhaust parts i'm going to need to import.

First plan of action was getting the RB headers, HKS front pipe, Knights cat and a Greddy cat-back system. Only problem there was i wasn't sure what headers i was supposed to be getting. Then when i asked about that i got told i didn't need the front pipe(headers replace that) because that's only for keeping the stock manifold. =s

So can someone help me with my exhaust system, mainly going for performance, and really wanna work it in with the Knights cat and the Greddy cat-back. Any suggestions? Need to be able to order online and deliver to Australia. =p