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**Shane@DBPerformance** · 01-23-2007

You can't rate them for max RPM without knowing what cams they are used with. They probably aren't even usable with something like an FP2x or FP3x cam that requires some fairly strong springs.

01-23-2007	#31
Shane@DBPerformance formerly ecoli Join Date: Oct 2003 Location: On the dyno Posts: 4,892	Re: Head Porting Question You can't rate them for max RPM without knowing what cams they are used with. They probably aren't even usable with something like an FP2x or FP3x cam that requires some fairly strong springs. __________________ www.dbptuning.com