vtwin996

resurrecting....any CELs with the cat by pass? I was think the 200cel until I erad the issue with track use. Thinking Fabspeed Supercup mufflers with the bypass. I have 103DB so should be good to go.

Leigh2

I ran the cat bypass pipes with stock mufflers and O2 sensor spacers on a previous 6GT3. CEL didn't come on for track use but did on the street...easy to reset with Durametric.

996FLT6

FYI Mooty had a custom exhaust(very similar to supercup) with bypass. I think it registered 106 db's. Mooty? Mike

Leigh2

I might have found a solution to the CEL issue with no cats.....check this out
http://www.maxspeed-motorsports.com/minicat.html

John@Fabspeed

Hey Guys, the catbypass pipes may set off a CEL light and its different on every car. But we sell our Oxygen Extenders with the bypass pipes to eliminate the light from coming on, so you wont need to worry about it. We also just released our new X Pipe Catbypass for the GT3 which makes a big HP and TQ increase over the previous design. I will be making a post on it shortly, so stay tuned. Here is a quick look at it below.

X Pipe Catbypass Pipe: http://www.fabspeed.com/996_GT3_51.html