2001 turbo Hayabusa, about 300 hp to the rear wheel. What do you recommend for the clutch set up? I do not want to use a lock up. I currently have a set of Brock’s stiffer clutch springs springs.

Our ultra mod and clutch cushion kit is the choice in Real Street (True Hand Clutch). These two modifications will allow you to launch the bike harder and also gain valuable et/mph down track.

Update: Spencer Claycomb sets XDA Real Street ET record at 7.66 in April of 2018, using Brock’s Performance Clutch Cushion Kit and Ultra Mod in his Nitrous Hayabusa (far lane):