yep far from stock its always sad when they make a class to be competitive for the average guy, but there is always that guy who has endless pockets and wants to be number 1 in a new class before everybody else jumps in. I've seen this way back in the 70's and my older friends say it was no different in the 60's.
ex: friend races a stock class. has special machine that goes inside a q jet to push out on walls to get extra cfm and flow. its hydralicly operated to do only this function. looks like a minature honing bush but you can expand it with hydralics.
yep these guys arn't looking for tenths but hundreths of a sec.