TEKKOAUTO 16 Pcs Hydraulic Roller Lifters 12595365 4 Pcs Guides Trays Compatible With GM Chevy Silverado Cadillac Pontiac GMC Buick LS1 LS2 LS7 LS3 LQ4 LQ9 HL124 4 Review

Reference OE Number: 17122490, 17120735, 17121905, 12499225, 25349994, 12564012, 12576400, HL124, H124, H128, HT-2148, JB-2079, HL-2148S, A2148, B2148, 850-16, 10530-16, HL124-16K, 77081-61416, 91113,12595365, 12551162, 12569259. Fitment: LS1, LS2, LS3, LS6, LS7, LS9 LSX Engines; Buick Allure LaCrosse Rainier; Cadillac Escalade CTS ESV EXT; Chevy Silverado 1500 Avalanche Impala Monte Carlo Suburban 1500 Tahoe Trailblazer EXT Avalanche Caprice Camaro Corvette; GMC Sierra 1500 Envoy XL Yukon XL 1500; Pontiac Grand Prix G8. Function: The hydraulic roller lifters was designed to compensate for this small tolerance, allowing the valve train to operate with zero clearance—leading to quieter operation, longer engine life, and eliminating the need for periodic adjustment of valve clearance. All of our parts undergo strict quality tests and are manufactured for better performance. These steps are a quality control for the parts to work for a long time. Installation under professional instruction is recommended. If you have any questions, feel free to contact us, and we will reply you as soon as possible.