HOLDEN 253 308 V8 PRO STREET 1.65 SHFT MNT 5/16"(HYD)

Holden 308 V8 Billet Pro Street Roller Rockers 

The YT 5032 Billet Pro Street Roller Rocker set features 16 identical arms engineered to handle up to 600 lb maximum open spring pressure, making them ideal for high-revving street and street/strip engines.

Each rocker is fitted with a 3/8" Platinum chrome moly roller tip, providing full valve tip coverage for improved contact, reduced friction, and outstanding long-term durability. Designed as a true bolt-on shaft-mount system, the YT 5032 retains factory-size bolt-down hardware while delivering strength and rigidity unmatched by comparable products in its class.

Manufactured and assembled in Australia, these rockers utilise the same premium materials and component quality found in our Platinum race series, offering race-proven durability in a street-friendly package.

Pro Street Performance Advantage

The Pro Street series allows engine builders to achieve increased valve lift through rocker ratio selection, rather than relying solely on aggressive camshaft ramp rates. This approach helps reduce inertia loads on lifters and pushrods while maintaining excellent valvetrain stability—an increasingly popular strategy among modern engine builders and racers.

These rockers are an ideal upgrade over factory stamped steel GMH rockers, many of which have suffered decades of fatigue and wear. Built tough, the YT 5032 rockers are designed to last in harsh street and strip environments.

Why Choose YT Pro Street Rockers?

• Rated to 600 lb max open spring pressure

• Oversize full-complement caged bearings designed specifically for oscillating (rocking) loads

• Oversize precision-ground trunnions to minimise friction

• CNC-machined billet arms, intricately balanced for valvetrain stability

• Aircraft-grade extruded aluminium for superior strength and heat dissipation

• Bolt-on shaft-mount design mounting inlet and exhaust rockers to a common shaft
  – increases footprint and clamp load without cylinder head modification

• Multiple ratios available to suit stock and aftermarket camshafts

• High ratios allow increased lift without aggressive cam profiles

• Chrome moly steel roller tips, hardened and precision ground
  – positively retained by internal circlip

• Prevents valve tip and guide wear common with non-roller rockers

• Smoother, quieter operation

• Maintains lash and reduces ongoing valvetrain maintenance

Fitment & Application

• Shaft Mount – Non Adjustable

• Suitable for hydraulic camshafts

• The original true bolt-on rocker system

• Simply remove the original rocker gear and install the shaft assembly using factory mounting holes

• No machining or cylinder head modification required

• Exceptional rigidity and reliability

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