Why does everyone say not to boost the c5? It has some of the best parts found in the b series motors. The high CR can definately help in low boost applications. Several other cars, such as the RSX have even higher CR's, but no one says not to boost it. Sure the ITR is a great all motor car. It revs to the sky, has agressive cams, and high compressin ratio. It also has great potential for boost though.