LS HYDRAULIC ROLLER LIFTERS SET OF 16 PART NUMBER: RLR102 REPLACES GM PERFORMANCE PART NUMBER: 12499225 Replaces GM PERFORMANCE PARTS Number: 12499225 Gen III engines: LS1, LS6, LQ4, LQ9 Gen IV engines: LS2, LS3, LS7, LSA, LS9 Gen V engines: L83, L86, LT1 These are NOT DOD lifters.