Full bolt on E63 BMW M6 vs. GTM Stage I twin turbo Nissan 370ZA race that we had been waiting to see for some time has finally taken place. MSIZZLE in his full bolt on M6 raced a GTM Stage I twin turbo 370Z. The M6 has dyno'd 510 whp uncorrected and the 370Z has put down 490 whp uncorrected. The cars are pretty close with the 370Z ultimately pulling a couple car-lengths. Check out the video below.