Crower 66493X903R-2 Features:

Crower Severe Duty mechanical roller lifters for BBC and Big Chief applications, part number 66493X903R-2, sold as a right-offset pair .903 in. OD design with intake right offset for precise lifter positioning in compatible high-horsepower valvetrain setups Raised pushrod seat height of +.300 in. helps improve valvetrain geometry and provides added pushrod clearance in the lifter bore Lightweight billet alloy bodies with stainless steel alignment blades support rigidity and durability in severe racing environments

Severe Duty Rollers With Raised Seat BBC/Big Chief Int Features:

• Billet alloy lifter bodies, severe-duty mechanical roller design, .903 in. OD for BBC and Big Chief applications
• Raised +.300 in. pushrod seat height, improved valvetrain geometry, increased pushrod-to-bore clearance in the lifter bore
• Intake right-offset configuration, precise pushrod alignment for aggressive high-lift racing valvetrain setups
• Stainless steel alignment blades, orbit-formed captive pins, no snap-ring retention for added reliability
• Right-offset pair, maximum rigidity and valvetrain control for high-horsepower BBC and Big Chief engine builds