Yella Terra Platinum Roller Rockers 1.65:1 Shaft Mount suit Holden 253 308 304 V8

Description

Yella Terra Platinum Roller Rockers 1.65:1 Shaft Mount suit Holden 253 308 304 V8.

Yella Terra Platinum race series roller rockers are manufactured and assembled in Australia using the highest quality materials and componentry sourced locally and from the USA. Extruded from aircraft grade aluminium, perfect for dissipating excess top-end heat.

Proven bolt-on shaft design featuring heavy duty 7/16” and 10mm hardware for stability and durability well beyond the chequered flag.

Oversize full-complement caged bearings designed for oscillating (rocking) loads, paired with oversize precision ground trunnions to reduce friction.

Suits all Iron head 253/308 engines (not EFI).

Specifications:

• PART NO: YT 5020
• MAKE: HOLDEN
• MODEL: VARIOUS
• SERIES: N/A
• ENGINE: 253|308 CARB V8
• YEAR: 1969-1988
• PART TYPE: ROLLER ROCKERS
• MOUNTING STYLE: SHAFT MOUNT
• ROCKER ARM RATIO: 1.65
• STUD SIZE: 7/16″
• ADJUSTABLE: ADJUSTABLE
• HYDRAULIC: –
• ROCKER ARM STYLE: FULL ROLLER
• SHIMS INCLUDED: YES
• ROCKER MATERIAL: ALUMINIUM
• SELF-ALIGNING: NO
• ROCKER ARM BODY STYLE: WIDE BODY
• ROCKER ARM NUT STYLE: CAPSCREW
• MAX SPRING DIAMETER: 1.550″
• MAX OPEN SPRING PRESSURE: 600lbs-1000lbs
• INLET OFFSET: –
• QTY: SET OF 16
• BRAND: PLATINUM
• NOTE: To machine for Platinum rockers, remove 0.300″ from Rocker Pads, drill and tap for 7/16″ UNC.

Suits the following engines:

• Holden 253 4.2L Red 4143cc V8 OHV 16V Carb Lead
• Holden 308 Red 5048cc V8 OHV 16V Carb Lead
• Holden 308 Blue Black 5042cc V8 OHV 16V Carb Lead
• Holden 253 4.2L Blue 4148cc V8 OHV 16V Carb
• Holden 5.0L 304 4987cc V8 OHV 16V EFI ULP
• Holden 355 Stroker 5820cc V8 OHV 16V Carb Lead
• Holden 5.7 HSV 5736cc V8 OHV 16V EFI ULP

Manufacturer Part Number: YT5020