SBC Mech Roller Lifter Set .842 +.300 TB

The MOREL LIFTERS SBC Mech Roller Lifter Set .842 +.300 TB is a complete mechanical roller lifter solution engineered for small-block Chevy applications requiring increased valve lift and precision rocker arm geometry. This 16-piece set delivers the 0.300-inch lift increase necessary for higher-rpm engine builds while maintaining the durability and reliability that mechanical roller lifters are known for in street, strip, and marine service.

Each lifter features a 0.842-inch outer diameter and incorporates a 0.180-inch offset design that optimizes rocker arm contact and reduces side loading on the pushrod. The +0.300 TB designation indicates the 0.300-inch tall design, which directly increases valve lift when paired with compatible camshaft and rocker arm combinations. Link bar construction ensures consistent valvetrain geometry across all 16 lifters, eliminating variance that can lead to uneven valve timing and accelerated wear. This standardization is critical in high-lift applications where precise valve event timing and duration preservation are essential for peak engine performance.

Builders upgrading small-block Chevy engines for competition, performance street applications, or marine duty rely on this lifter set to support camshafts in the 0.500+ lift range. The mechanical roller design eliminates hydraulic lag found in conventional hydraulic lifters, delivering crisp valve action across the entire rpm range. Compatibility verification with your specific camshaft profile, rocker arm geometry, and head specifications is necessary before installation to ensure optimal clearance and valvetrain stability.