dls91

hi im looking for a berk hi flow cat. i currently have a invidia q300 exhaust but i dont no what the pipe diameter is so im not sure whether i require a 63 mm or a 70mm.

Chuck S

Since the header is less than 60mm I put the 63.5mm high flow cat between it and my Q300 dual exhaust. I've read in the internet it's better to transition the exhaust flow rather than dump it direct to 70mm. Something about preserving mid range torque. Never seen any scientific data though.

-- Chuck

mantecosa

If you find a 70mm, I would be willing to P/X + money your way for my standard de-cat 63mm pipe.

dls91

bumpo