・Made of high-quality aluminum alloy material, the product is not easy to rust and has a long service life ・A great helper to remove old stock valve springs and install new valve springs ・This tool kit is for 4.8, 5.3, 5.7, 6.0, and LS1, LS2, LS3, LSX, LS Tahoe engines and is a must-have when it comes time to install a new set of valve springs Note: ・When installing, please carefully check the scope of application of the product to prevent incompatibility. Specification: ・Item number: A6113 ・Product material: aluminum alloy ・Installation position: threaded hole of spring compressor for LS valve ・Product function: an auxiliary tool for engine maintenance Instructions: ・Remove the valve cover and remove the rocker arm and rocker arm guide. ・Put the bottom aluminum plate on the head with the rocker bolts installed and the middle section on the top with the studs, then use the 2 bolts included to mount it to the head to make sure the tool is on the 2 Intermediate positions between the valve springs. ・Hand tightens with ratchet and socket. Do not over-tighten to avoid head damage. ・Put the top on the 2 valve springs and install the included nuts. Make sure there is grease on the studs. Use suggestions: ・If you are going to use this valve on an engine-mounted cylinder head, you will need a fitting that uses compressed air in the spark plug hole to keep the valve closed before tightening. ・Only use hand tools to slowly tighten the nut, do not hit the nut too hard to avoid overheating the nut and stripping the threads ・After compressing the spring, you can remove the valve retainer with a magnet to keep it from falling into the head. ・After removing the retainer, you can reverse the nut and slowly release the pressure and remove the spring. ・Install new springs using the same steps. When reinstalling the valve retainer, be sure to hold it in place so that it is properly seated before releasing pressure. Package included: ・2 x long Studs ・1 x Valve Spring Compressor ・2 x Short Studs ・4 x Screw Nuts ・4 x Gasket