This handy tool is designed to remove/replace valve springs while the cylinder head is on the engine saving both time and effort. Precision machined from heat treated alloy steel with a black oxide finish for durability and longevity. Intended for use in conjunction with an Air Hold Adapter (555-80522 or 555-W84003 sold separately) and your air compressor to hold the valve closed during servicing. .
GM LS1, LS2 & LS6
GM LS3, LS9, L92 & L99