A must-have for replacing the front or rear main seal on GM LS series engines. Perfect Fit for GM LS Engines: Specifically designed for GM LS engines, including 4.8, 5.3, 5.7, 6.0, LS1, LS2, LS3, LS6, L99, LS4, LS9, LSA, LQ4, LQ9, L76, and L92 models.