These Street Performer valve springs are an excellent choice for a mildly built engine running naturally aspirated or low boost (0-10lbs). We recommend these for use with our Pro series or Stage 2 Camshafts steps. They have 53lbs of seat pressure @ 1.44" install height and about 145lbs @ .450 lift. with a coil bind at .550" from install height.
Contact our Tech Support Line for further information at 928-855-6341.
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