Yella Terra YT6744 Studebaker Avanti V8 1.75 Adj Roller Rocker Shaft System

Complete with fully adjustable aircraft grade extruded aluminium arms, 4-piece shaft, precision cnc anodized cradles and all the necessary mounting hardware to punch life into any Avanti V8. No Machining required mounts directly to factory cylinder head. Nominal 1.75 ratio.

Equipped with smooth low friction rollers allowing for high revving capability perfect for any street, strip, circuit or hill climbing application. Precision CNC anodized cradle providing unsurpassed rocker stability eliminating premature valvetrain wear and radically reducing side loading. 

Higher ratio rockers produce more lift out of a given cam profile. In addition, lift the the valve off the seat at a much more rapid rate when compared with stock ratio rockers, producing increased and sustained airflow. Reliable at high RPM with huge needle roller bearings. Your engine will run cooler, smoother and quieter.

100% Australian manufactured and designed, the ultimate go-fast-bit for the legendary 29 time record-breaking Studebaker Avanti!

Why Choose Pro Street?

• Built to withstand 600lbs* max open spring pressure
• Oversize full-complement caged bearings designed for oscillating (rocking) loads, paired with oversize precision ground trunnions to reduce friction.
• Intricately balanced CNC billet arms ensuring vital valvetrain stability - focusing attention on the harmony of the entire engine.
• Extruded from aircraft grade aluminium, perfect for dissipating excess top-end heat.
• Proven bolt-on shaft mount design that mounts both inlet/exhaust to common shaft, effectively increasing footprint and clamp load twofold without any further cylinder head modification.
• Chrome moly steel hardened and ground roller tips of generous diameter (positively retained by internal circlip) preventing abrasion of valve tips and guides commonly seen with non-roller tip rockers. Allows for smoother, quieter operation. Maintains lash and reduces necessary and tedious engine maintenance.