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Stock vs. Mopar Perf. Valve Springs

Posted: May 21st, 2012, 3:51 am
by CobraMarty
What is the difference between the two? I have searched and I can't find the difference.

I have found:
Stock [email protected]" [email protected]"(.434"lift) and [email protected]"(.450"lift) 327lb/in But I also found
[email protected]" and [email protected]"
Mopar Perf [email protected]" and [email protected]"(.485"lift) 270lb/in 1.42"OD

Is this right?