Planning out my exhaust system and not too sure what headers i should be getting... Currently have planned HKS front pipe, Knights cat and a Greddy "cat back" system. Online ordering is a plus!

 

Most people here would recommend Racing Beat headers but I heard SDJ ones were better.

 

That depends on the setup. The RB header is a good all-around header, but there might be some better ones in certain applications. I always recommend the RB header because it is very high quality and works quite well. The main thing you need to make sure about is the length. The RB header bolts up to the RB presilencer which bolts up to the stock location of the y-pipe, so it connects to any aftermarket cat-backs. Since it sounds like you want a cat, Bonez makes a cat that you can get from rx-7.com that will bolt up from the RB header to the stock catback location. Or you could get any rotary-grade cat and have it made to fit that space.
Also, you don't need the front pipe, that is only for if you keep the stock exhaust manifold, the header replaces it also.

 

Ahhh thanks alot, heaps of help already. Yeah already decided on a knights cat, problem is i'm not sure what RB headers i should be buying, is it the Road Race Header 13B Peripheral Port? Get abit confused when it comes to the ports,ect.