Features: 1.Rear cover alignment tool, fit for GM LS1 LS2 LS3 LS6 L99 LS4 LS9 LSA LQ4 V8 engines. 2.The seals must be completely concentrically aligned with the front diameter of the balancer hub and rear sealing surface to ensure proper sealing function and longevity. 3.Made of high quality aluminum alloy material, rugged, anti?corrosion and durable, not easy to damage and deform. 4.The installation is simple, does not require complicated operations, which is convenient for using. 5.Manufactured according to the original production specifications, in line with strict quality standards. Specification: Item Type: Rear Cover Alignment Tool _x000D_ Material: Aluminum Alloy_x000D_ Fitment: for GM LS1 LS2 LS3 LS6 L99 LS4 LS9 LSA LQ4 V8 engines_x000D_ Instruction:_x000D_ On the LS engine, the oil pan is a stressed member and adds to block rigidity. For this reason, it can't be slapped in place; along with the front and rear engine covers, it must be carefully aligned with the block.