COMP Cams 99850X-2 Race XD .904" BBC Bronze Bushed Solid Roller Lifters with REM Finish (2-Pack)

COMP Cams Race XD solid roller lifters are purpose-built for high-horsepower, high-RPM race engines demanding the utmost in valvetrain durability and precision. This two-lifter set (MPN: 99850X-2) features a .904-inch diameter body sized for Chevrolet Big Block applications and is finished with a REM surface treatment for an ultra-smooth contact surface that significantly reduces lifter body and lifter bore wear. This set ships without pushrod seats, allowing you to select only the offset required for your specific cylinder head and valvetrain configuration.

Key Features:

• Proprietary bronze alloy roller bushing replaces the traditional needle bearing design for exceptional strength under extreme operating conditions
• REM-finished lifter body creates an extra-smooth surface to minimize friction and extend lifter bore life
• .904" diameter body designed for Chevrolet Big Block engines
• Modular, lightweight design with five interchangeable pushrod seats sold separately — available in 0.090" and 0.180" offsets, left or right placement, to accommodate a wide range of cylinder head intake angles
• Pushrod seats accept both 5/16" and 3/8" ball pushrods for broad valvetrain compatibility
• Redesigned internal oiling system delivers consistent roller wheel and axle lubrication, eliminating the oil starvation that is the leading cause of roller lifter failure
• Captured link bar design joins the lifter pair together for proper alignment and retention
• No seats included — order separately for maximum configurability
• Backed by COMP Cams' limited lifetime warranty against manufacturer defects

The Race XD series represents the evolution of COMP Cams' Elite Race and Sportsman solid roller lifter programs, combining the best technology from both lines into a single, versatile race-grade lifter.