I would be happer if my Contour had a Yamaha engine in it.

My SHO's engine was way smoother throughout it's whole revv range. And when it's secondary intake runners opened up at 4000rpms there was a VERY noticable surge in power. Also, the SHO Taurus I bought used with 107k miles on it. For the 2 years I had it I put 30k miles on it and during those 30k miles it visited 7400rpms every other red light.

No problems with the engine at all. I went through two clutches with that car, though. Duratec has nothing on the SHO engine.