I just wanted to thank everryone who helped me with my code "17 " check engine light. I plan to fix it this week!!! I had a queston too! I wanted to know what kind of HP gain I will get with a new "cat back" system. I plan on going with the Blitz model. I have a Pettit cold air intake on now. What kind of HP will I get with the cat back? Will a new 3 inch DP help? thanks, mike.

 

nobody?

 

i'm not sure how much increase in hp you'll get, but let it be said that it will be very loud... just search and try to find hp/tq increase numbers somewhere

 

there was a post a while back where jason from the rx7 store said that the blitz exhaust sounded like a weedwacker. he didnt like it at all. i have the gt spec exhaust from apexi and it really has a nice sound to it. it is kinda loud but that is what i wanted.

 

this was up a day or two ago. https://www.rx7club.com/forum/showth...hreadid=117063

 

words of wisdom....ditch that precat and put a DP on there...if you can afford it....go ahead and open it all up with a high flow cat and the catback.