Valve Spring Compressor Tool Kit For Chevy LS1 LS2 LS3 LS4 LS6 LS7 LSX LQ4 LQ9. Our LS valve spring compressor tool works with any LS based engine, and any valve springs (single or dual). 1 valve spring tool, 1 8.8 grade stud, and 1 8.8 grade flange nut.