Best of the best replacement for comp 921 valvesprings?
#1
Best of the best replacement for comp 921 valvesprings?
I currently am running a 921 valvesprings kit and have 40k miles on them with lots of boost! I just would like to know if there is such a thing as a better spring as the Pac 5221 spring? I am not going to remove the springs and the pockets will not be cut.
#2
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Comp 926. Brand new, promised to last 3 years shy of forever, best thing since sliced bread.
Seriously, I'm not a metalurgist, but it's a completely new type of metal used. I was told by the guys at Thunder that these would last as long as I owned my car, and I'm doing ONLY road racing.
Seriously, I'm not a metalurgist, but it's a completely new type of metal used. I was told by the guys at Thunder that these would last as long as I owned my car, and I'm doing ONLY road racing.