Exhaust systems for 996TT

[turbodoc]

Getting ready to upgrade the exhaust system on my 2001 996TT. A variety of systems exist - but what is the significance of the number of cells? Is more better? How does the cell # relate to perfomance?

Thanks

turbodoc

[wross996TT]

Getting ready to upgrade the exhaust system on my 2001 996TT. A variety of systems exist - but what is the significance of the number of cells? Is more better? How does the cell # relate to perfomance?

Thanks

turbodoc

The less cells, the less restrictive. So straight pipes are the least restrictive...LOL. Remember you need to consider emissions for your area and there are times when you need an ECU adjustment if you run less restrictive. Also some 100 cell cats have been known to cause CEL, depending on the quality of the exhaust (and the surface area of the cells).

Edited October 10, 2009 by wross996TT

[Chuck Jones]

I just went and had my DMV smog check run on my 02 996 TT that's running the 100 cell cats on the Europipe system, and the mechanic remarked how clean the numbers were. California has some of the most stringent smog requirements, so I'm very pleased with the results produced by the EP exhaust system....but of course you have to remember that none of the smog shops have a four wheel dyno, so they're getting the results from the up-your-kazoo tailpipe readings using the probe.....but bottom line is that the numbers were spectacular.

My compliments to Stef and his design and quality builds.