Performance lifters 88958689 for Cadillac Racing Lifters and GM Lifter Tray Guides 12595365 Set of 16 High Performance Bowtie Lifters Developed for the CTS-V Cadillac Racing program to meet the demands of high revving engines, this is the ultimate factory LS lifter. The performance engineers designed special reduced mass internal lifter components to allow the LS engine to accelerate up to 8000RPM's without experiencing problems associated with hydraulic lifters. Also know as "Caddy Race Lifters", these are proven performers from the GM Race Team engines. The valving in these lifters is optimized for single spring applications, not recommended for higher pressure dual spring combinations. Recommended preload is .050" - .100". Lifter Tray Guides 12595365 LS1 LS2 LS3 4.8 5.3 5.7 6.0 6.2 Set of 4 Non-DOD/AFM Trays, fits all Gen 3, 4 & 5 LS & LT Based V8 Engines Valve Lifter Guide, Plastic, Hydraulic Roller We highly recommend replacing your lifter trays to this new updated design NOT compatible with DOD or AFM lifters LS1 LS2 LS3 LS6 LM7 L33 LFA LSA LH6 LQ4 LQ9 L76 L92 L99 L96 LC9 LY6 LMG LH8