COMP Cams 99958X16 Race XD .904 Hydraulic Roller Lifter Set for LS Engines

The COMP Cams 99958X16 Race XD Hydraulic Roller Lifter Set is engineered for high-performance LS engine builds demanding maximum durability and valvetrain stability under aggressive cam profiles. These .904-inch diameter lifters are designed as a direct fit for LS-series engine applications, providing a precise, drop-in upgrade over stock components.

COMP Cams' Race XD (Extra Duration) lifters feature an extended travel design that accommodates more aggressive camshaft profiles with greater lift and duration than standard hydraulic roller lifters can support. The XD technology allows these lifters to handle the demands of high-RPM race and street/strip builds while maintaining proper oil pressure and valvetrain control.

Key Features:

• Race XD (Extra Duration) hydraulic roller design for use with aggressive cam profiles
• .904-inch body diameter — direct fitment for LS engine families
• Enhanced travel range to accommodate high-lift, long-duration camshafts
• Precision-machined roller wheel for reduced friction and improved durability
• Compatible with COMP Cams and other high-performance LS camshafts
• Designed for street/strip, road race, and competition engine builds

Upgrade your LS engine's valvetrain with the reliability and performance of COMP Cams Race XD lifters — the ideal companion to any high-performance LS camshaft swap.