High Horse Performance, Inc.
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PSI Valve Springs & Manley Titanium Retainer Set for 03-08 5.7L & 06-10 6.1L HEMI
In order to run the higher lift cams on the non-variable cam 5.7L and 6.1L HEMI's, you will need to upgrade your stock valve springs. Through our testing which has involved the breaking of many other valve spring combination's that are currently on the market, we have come to find that this ...
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