Yesterday I had me new setup tuned by Jeff Evans and it did 380whp with stock cat. Jeff said I could see 15-20whp with a test pipe but I hate that smell, thats the reason I never did it. Can anyone recomend a good high flow cat? I looked at ebay but I dont know. I want somehting that will flow better but eat up some of that gas smell.

Thanks

 

Honestly any cat or hfc will be destroyed very soon by the heat generated under boost. I Originally had a berk hfc on my car and the 13psi i made from my ctsc caused the honeycomb to come lose within 2k miles. Not really a good way to blow $150..

I'm glad I got a test pipe because of the much better throttle response and I eventually got used to the smell.

 

Ya I have heard this afew times but have had a Berk HFC on my 10psi CTSC for a long time and its doin fine. I guess you just need a HFC friendly tune?

 

Im bosting 12 but a HFC should lower boost 1-2 psi. Ill look into berk. Thx!