COMP Cams 99958DX16 Race XD DLC-Coated Bushed Solid Roller Lifter Set for GM LS .904" Diameter

The COMP Cams 99958DX16 Race XD Solid Roller Lifter Set is a premium, DLC-coated bushed solid roller lifter set engineered for high-performance and race-use GM LS engines with a .904" lifter bore diameter. Combining the best design elements from COMP Cams' Elite Race and Sportsman lifter lines, the Race XD series represents the pinnacle of valvetrain technology for demanding racing applications.

These lifters feature a Diamond-Like Carbon (DLC) coating applied over a REM-finished lifter body, delivering an ultra-hard, ultra-smooth surface that minimizes friction and lifter bore wear to an extreme degree. A proprietary bronze alloy roller wheel bushing provides exceptional strength and durability under the most severe operating conditions, while the oversized captured link bar keeps each lifter pair positively located in the bore.

A redesigned internal oiling system specifically targets the most common cause of roller lifter failure — axle and roller wheel oil starvation — by ensuring consistent lubrication to both the roller wheel and axle at all times. The modular, interchangeable pushrod seat design allows builders to select the precise offset needed, reducing unnecessary pushrod angularity and dramatically extending lifter service life.

Key Features:

• DLC (Diamond-Like Carbon) coating over REM-finished lifter bodies for maximum surface hardness and reduced friction
• .904" diameter lifter body for GM LS engine applications
• Premium proprietary bronze alloy roller wheel bushing construction
• Redesigned oiling system eliminates roller axle and wheel oil starvation
• Oversized captured link bar design for positive lifter retention
• Lightweight modular design with interchangeable pushrod seats (sold separately)
• Compatible with optional .090" and .180" left or right offset pushrod seats
• Pushrod seats accommodate both 5/16" and 3/8" ball-end pushrods
• Set includes 16 lifters (no pushrod seats included)
• Limited lifetime warranty against manufacturer defects

The COMP Cams Race XD DLC lifter set is the ideal choice for serious race engine builders who demand the strongest, most durable, and most precisely configurable solid roller lifters available for the GM LS platform.