I am looking to further the improvement of my car's sound without hindering the "rotary" sound. Currently, I have the K&N intake and the Greddy SP2 as my exhaust. I have already read up on midpipes, testpipes, and hi-flow cats. I wanted to shoot flames, but I didn't want the fumes to go with it, so I decided a hi-flow cat would be nice. I read some threads about the Rotary Perfomance Super-Cat on RX7.com. I want to know what kind of sound improvement will that give me compared to the stock improvement. Thanks.

 

Its going to be a LOT louder, i dont know if you consider that an improvement. :D

 

I have the Greddy SP2 with RP High-Flow cat pipe, my friend aka Renesis04 on the forums has just the Greddy SP2 exhaust.

In comparison, his exhaust is non-existant compared to mine. You can ask Renesis04 if he reads this thread, but with the pipe, it's A LOT louder than just stock pipe and the greddy exhaust. Renesis is going to be getting the B&B pipe I think, so it will be intersting to hear the comparison on loudness between straight through pipe and high flow pipe. Hope this helps

 

Thanks for the insight. Does yours drone while driving at a semi-fixed RPM?