I wanted to know about your 3" Hi-Flo cat.....

whose core do you use and how many cells does it have?

How much power am I losing now by having it in place instead of a test pipe on a 500 AWHP car?

 

I had a 50trim setup on my car and made 394 through the AMS HFC, and switched to a test pipe and made 402.

the 394 was made in november, the 402 was like march maybe???
I don't think temperature was too far different though.

hope that helps you a little?