Originally Posted by RobR
Back in the M/P class days when 10000 to 12000 rpm was standard that was the only way to do it. Every M/P engine I ever saw had a rev-kit...
Given the work Ben Strader and others had to do to get the "Spinal Tap" LS to run at 11,000 rpm I wonder if the Modified Production engines from back in the day had any real valve control at those RPMs.