SBM Rocker Arms - 1.7 Ratio

The SBM Rocker Arms - 1.7 Ratio from SHARP ROCKERS delivers a straightforward bolt-on upgrade for enthusiasts and mechanics seeking improved valve actuation and cam lift multiplication. These rocker arms are designed for small-block engine builds where maximizing valve lift without cam grinding is the goal. A 1.7 ratio rocker arm multiplies your camshaft's lift by 1.7 times, transforming a modest cam profile into significantly more aggressive valve motion—ideal for street performance, mild racing builds, and engine swaps where OEM geometry falls short.

SHARP ROCKERS engineered these rocker arms with precision-cast construction to handle the mechanical stress of increased leverage and dwell time. The 1.7 ratio design increases effective valve lift proportionally, allowing builders to work with lower-duration cams while achieving the flow characteristics of a more aggressive profile. Proper ratio selection is critical—too high a ratio risks valve interference and violates geometric constraints, while 1.7 strikes a reliable balance for most small-block applications. The casting quality and bearing surfaces are engineered to minimize wear and maintain consistent rocker geometry throughout extended use, essential for reliability in street and weekend warrior applications.

These SBM rocker arms suit builders upgrading classic small-block engines—Chevrolet, Ford, and Mopar applications are common candidates. Installation requires proper valve clearance setup and verification of pushrod length to avoid binding or excessive lash. Confirm your specific engine family and block casting before purchase, as rocker arm bosses and stud patterns vary. Professional installation or experienced DIY builders should verify all clearances, particularly checking valve-to-piston interference and rocker-to-head contact. The 7.1 lb weight and compact 7.3 x 2.3 x 15.3 inch dimensions fit within standard engine bays without modification.