SBC Roller Rocker Arm - 1.5 Ratio 7/16 Stud

The SBC Roller Rocker Arm - 1.5 Ratio 7/16 Stud from Scorpion Performance is purpose-built for small block Chevy engine builders and enthusiasts seeking maximum valve train efficiency and durability. Whether you're assembling a street performance engine, a weekend drag racer, or a high-RPM competition build, this full roller rocker arm delivers the precision geometry and mechanical advantage needed to unlock cylinder head potential. The 1.5 ratio design provides optimal lift multiplication for aggressive valve events while maintaining reliable contact across the entire valve opening cycle.

Constructed from lightweight aluminum and finished in durable blue anodizing, this roller rocker arm employs full roller needle bearings to minimize friction and eliminate wear patterns common in flat-tappet designs. The 7/16-inch stud mount system ensures secure fastening to your cylinder head and allows for adjustable rocker geometry to fine-tune valve timing and lash on the dyno. The 1.5 ratio geometry amplifies camshaft lift by 50%, allowing smaller displacement engines to breathe like larger mills while reducing valvetrain mass and inertia—critical factors when chasing peak horsepower and maintaining RPM stability in the 6000+ range.

This rocker arm is sold individually, so complete rocker coverage requires purchasing one arm per valve—typically 16 arms for a standard small block Chevy V8 with dual valves per cylinder. Installation requires proper stud preparation, valve lash adjustment, and verification of rocker geometry clearance before running. Racers and engine builders favor Scorpion Performance roller rockers for their consistent precision, low parasitic losses, and proven track record in both naturally aspirated and forced-induction applications where valve train reliability cannot be compromised.