This is for the non coil on plug KA crowd. Some of you run LS coils still, and some are on the stock distributor. This is for you guys. Machined of 6061 billet aluminum equipped with stainless hardware. Choose which bracket you need in the drop down menu according to what valve cover you want to put it on. S13 has three bolt holes in the center valley. S14 has two bolt holes in the center.