[Hotfingrs]

First I have never worn a set of rings out, but then again, I've never had them in there long enough.....Freshening could be done in different degrees....In 2 years time I probably put 3K on the Cobra engine. The roller lifters are changed every other year, and the valve springs I also get 2 yrs use out of, but after one year I switch the intake and exhaust springs with each other