Nightfly

Leslie, I'm in NJ too; how do you get around the emissions without the cats?

Leslie 928 S2

Ummm....track use only?

That car's not in NJ, either. Nor are cats needed where it is...

I have large cell shorty cats on my car...work great!

hacker-pschorr

The SS Y-pipe on my car was a direct bolt on with the stock manifolds. I had a simple adaptor made when I switched to the SS manifolds.

I'm a single exhaust kind of guy

Imo000

I'm running an old design H-pipe (it was made by one of the suppliers back before the X hit the market) and it really did wake up the car. I know it's not as efficient as the X, but still a lot better than the stock setup. The change was made after the supercharger was installed so I can't say how well it works in a N/A 928 but it sure make a big difference in a boosted engine.

SMTCapeCod

I should add that the 90' bend aft of the pass side muffler is less than ideal...but I doubt it would have any effect that could be distinguished without serious instrumentation.