Anybody have experience with Car Chemistry collector inserts?
I am using them in my setup right now and really like how they elliminated a very annoying resonance at 2400 RPM. Turned into a crisp sound.

My setup consists of Hooker LT's, Mufflex Y pipe and Borla catbak.

When racing I remove the catback and install a 3"x 12"Bullet and 3"x 12" turndown.

I wonder how much power I am loosing due to the inserts in the collectors.

 

Probably not to many people with your type of set-up. I would call Car Chemistry and ask what they think.