Crower 66493X903L-2 Features:

Crower 66493X903L-2 Severe Duty roller lifters for BBC and Big Chief applications, sold as a pair. .903 in. OD design with .150 in. left intake offset for compatible valvetrain geometry. Raised seat provides +.300 in. seat height over standard Chevy rollers for added pushrod clearance. Designed to fit Dart BBC blocks and helps eliminate lifter-bore grinding for pushrod clearance.

Severe Duty Rollers With Raised Seat, BBC/Big Chief, .903 Features:

• Raised-seat design with +.300 in. seat height for improved valvetrain geometry in Dart BBC blocks and added pushrod clearance without lifter-bore grinding
• .903 in. OD severe-duty roller lifters for BBC and Big Chief applications, built for left intake offset valvetrain layouts and stable lifter positioning
• .150 in. left intake offset supports Big Block Chevy and Big Chief combinations requiring corrected pushrod alignment and optimized rocker geometry
• Pair configuration for left-offset intake use helps streamline matched lifter installation in performance engine builds using raised-seat roller lifter setups
• Designed to reduce lifter-bore modification during assembly, saving build time while maintaining pushrod clearance in raised-seat BBC valvetrain combinations