Quote:
Originally Posted by SDCoupe
I don't know if the variable back pressure muffler came on NA cars. I know I don't have it. At least I don't think I do. It's interesting because the M versions have the same hp ratings for NA and euro. If it was a cat thing for NA you would think they would be affected too. I'm thinking it's just the variable back pressure exhaust. But I'm not sure if all 3.0si came with those in Europe.
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Actually, the M cars are different. In Europe I believe the engine has about 341 hp, but in NA it's 330. The NA cars have an extra cat. Someone can probably be more accurate with the actual hp values, but they are indeed different.
