ummm, maybe your not listening the engine had SRP pistons made to run with a b16a head and the piston to valve clearnce was checked FOR THESE SUPER HIGH LIFT AND DURATION CAMS. there was more than the normal .1" clearnce. the only reason the valve hit the piston is that A valve broke and was flyin around inside the clyinder at ~7k. the engine was revved way higher than 7k pulling its way to 150mph(8.5k) over the bridge for the 3 weeks the cams were in the car before it broke. the car wasn't just trown together it was fully built with crower rods srp pistons,& a P&P head. Its not a big deal I got an extra b16a head in the garage, anyway i wanted a reason to build a cr\vtec or a 2.0L GSR...