①OE Design Refer to 12595365, Offering the quality, reliability, and durability of GM OE
②Manufactured to GM OE specification for fit, form, and function
③THIS IS A SET OF 4 GUIDES
④Fits for GM Gen IV V8 engine lifter guides (aka buckets). Fits for LS2, LS3, LS7, LSA, LS9 etc. Gen IV V8 engines. Works with Gen III blocks (LS1, LS6 etc.) & Gen V blocks (LT1, L86, L83, LT4)
⑤Can also be used on Active Fuel Management (AFM) / Displacement On Demand (DOD) engines to switch to standard lifters. Not work with AFM/DOD lifters - you must switch to conventional LSx lifters