The turbo "kit" was home made when I purchased the car and came with the 57's and a dyno tune that made 720hp thru the manual trans on 93oct @18-20psi. The 57's should be good to around 800hp with more boost and a manual trans.Thank you Kevin$. What do you have $ wise in just the kit? Are you growing out of those 57's? Should I go with 60's no?