This particular tool is the Company 23 Valve Spring Compressor Tool. The intended purpose of this tool is to compress valve springs with the head on the bench or on the engine in the car. The design makes for an easy replacement of valve stem seals, valves, springs, and retainers. And the design will not slip or damage the head like universal clamp compressors are known for. The roller ball thrust bearing provides a smooth operation even with upgraded performance valve springs. A magnetic screwdriver will be included to make installation and the removal of the valve keepers simple.
Used in place of factory tool #498267600 and #499718000