Quote:
Originally Posted by
A Y 
OK, if you're going to get a used car, then less than $60K is possible. TPC Racing's 550HP kit is $14K and the S3 suspension is $7K, or about $21K added to your used car's price. I don't think anyone's found a way to put the GT3 suspension on a Cayman yet, and emissions and reliability are huge questions.
--Andre
Some race team was running a Cayman with GT3 engine and suspension a couple of years ago and dominating the field; Porsche asked them to stop (iirc, Porsche
gave them a GT3 RS to quit). From what I've read, any 996/997 engine will fit any Cayman or Boxster is you modify the car's engine mounts to lower the engine a bit.
I don't think emissions or reliability would be an issue - we're talking Porsche standad production parts.