Name: Yella Terra Holden 304 / 5.0L EFI V8 Pro Street 1.65:1 7/16 Adaptor Shaft Rockers — YT 6309A
Brand: Yella Terra
SKU: YT 6309A
Price: 1480.00 AUD
Availability: InStock

Yella Terra YT 6309A Holden EFI 304 V8 Pro Street rocker set with 7/16 pedestal adaptor hardware

Yella Terra Holden 304 / 5.0L EFI V8 Pro Street 1.65:1 7/16 Adaptor Shaft Rockers — YT 6309A

$1,480.00

Yella Terra’s Pro Street shaft-mount roller rocker system is designed for high-revving street and strip Holden EFI V8 combinations using VN-style cylinder heads. The 1.65:1 adjustable full-roller design uses the heavy-duty bearing and trunnion architecture derived from Yella Terra’s Platinum race series.

Pro Street construction

Set of 16 adjustable full-roller aluminium rocker arms.
1.65:1 rocker ratio.
Supplier-rated to less than 600 lb maximum open spring pressure.
Oversize full-complement caged bearings and precision-ground trunnions are designed for oscillating rocker loads.
Balanced CNC billet / aircraft-grade aluminium arms provide strength with controlled valvetrain mass.
Hardened and ground chromoly roller tips reduce valve-tip and guide wear.
Common-shaft mounting increases rigidity and clamp footprint.
Maximum spring diameter: 1.437 in.
Shim set included.
Suitable for hydraulic and solid camshaft combinations when set up correctly.

7/16-inch pedestal adaptor configuration

Includes Yella Terra’s special 5/16-to-7/16 pedestal adaptor kit.
Designed for VN-style heads where the rocker mounting posts have already been machined for 7/16-inch UNC screw-in threads.
Yella Terra specifies the factory posts are typically machined lower by approximately 0.280–0.310 in for this configuration.

Application: Holden 304 / 5.0L EFI V8 combinations using VN-style cylinder heads. Confirm the cylinder-head rocker-post machining and mounting-thread configuration before ordering.