Product Description Specifications (4) Valve Spring: (in 9900-Kit) .700 lift, 1.550 OD, .710 ID, 230# @ 1.875", 700# @ 1.200", 1.110" c Category: Engine Components>Engine Hardware Clearance Item: N Core: N LTL: N MPN: 999-4 Proposition 65: N Special Order: Y