Repair-It

https://www.youtube.com/watch?v=TvQHgt-tF7Y

I think we know they do. How much is the question.

The clear valve covers are cool.

Ah, that was interesting. If you want to run a stock 1.5:1 ratio, just run a good quality stamped rocker and upgraded studs. You can see some power upgrades if you upgrade to a 1.6 but surprisingly, the roller did NOTHING for power by itself.