Valve Spring Compressor Tool Kit For Chevy LS1 LS2 LS3 LS4 LS6 LS7 LSX LQ4 LQ9. Fits any GM based LS engines: LS1 LS2 LS3 LS4 LS6 LS7 LS9, LSA, LQ4, LQ9 and LSX engine. For GM LS series valve spring compressor tool works by using compressed air in the cylinder at TDC, allowing valve springs or seals changes without removing the cylinder heads.
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