Been doing some research, I went to Autotech today and spoke with Spiro, then called Nizpro and C&V performance All transmissions can handle around the same power level based on what I was told by the respective workshops drive-in drive-out prices: CMS stage 2 transmission with billet input shaft, approx. $7500 Autotech stage 2 with billet input shaft $6000 Nizpro stage 2 transmission with stage 2 billet input shaft $7000 C&V performance with billet input shaft $10000 ( C&V couldnt tell me what power it's rated to , lol) Very surprised at how cheap the Nizpro package is, they said they have sold hundreds of billet shafts , surely has to be the most tested and proven shaft?