High Horse Performance, Inc.
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PSI LS 1511 ML Valve Springs for 03-08 5.7L & 06-10 6.1L HEMI
In order to run the higher lift cams on the 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 special PSI sprin...
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