Calling all 550 experts

Hi there,

It has come to my attention that North American 550 models year bulit post 2000 have precats in the exhaust manifolds which reduce performance quite substantially. This was not a problem for European models, who are not faced with the stricter N.A. emissions guidlines.

I have heard quotes of as high as 0.5 secs difference for 0-60 times between 1997-1999 and 2000-2001.This is an outrageous situation!

My question is...what can be done about it?

Are there after market solutions...ie,new exhaust manifolds.

Can one purchase and install European exhaust manifolds without reprecussions ?

Looking forward to hearing from anyone in the "know"

Thanks,

Goldy