1.65 RATIO - 5/16" HYDRAULIC SHAFT MOUNT ULTRALITE ROLLER ROCKERS
SUIT HOLDEN 304 V8 - 1988-2000
Ultralite
Yella Terra’s exclusive Ultralite rocker arm, shaft and pedestal system offers 50% less nose weight than the factory rocker system, the result being greater RPM potential without compromising strength or durability. The perfect low-maintenance substitute for factory rocker arms which utilise problematic cage-less bearings, solid non-roller tips and heavy steel bodies.
Specifically Designed and Machined to suit VN Style 304 Heads, Our Latest Pro Street YT 6797 Rocker arms are the optimum low maintenance entry level CNC Machined Hydraulic Roller rocker for Street & Factory replacement applications.
Yella Terra Ultralite is ideal for high revving street applications when coupled with factory/lightweight aftermarket springs. Manufactured and assembled in Australia using the highest quality materials and componentry consistent with those found in our Platinum race series.
Why Choose Ultralite?
- Built to withstand 400lbs* 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 lightweight arms ensuring vital valvetrain stability - focusing attention on the harmony of the entire engine. 50% less oscillating nose weight eliminates valve float in upper RPM range allowing for higher rev ceiling.
- 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.
ITEM SPECIFICS
| PART NO | YT 6797 |
| MAKE | HOLDEN |
| MODEL | COMMODORE |
| SERIES | VN-VT1 |
| ENGINE | 5.0L 5.7L EFI V8 Applications using "VN" Heads |
| YEAR | 03/89|06/99 |
| PART TYPE | ROLLER ROCKERS |
| MOUNTING STYLE | BOLT ON SHAFT TYPE |
| ROCKER ARM RATIO | 1.65 |
| STUD SIZE | 5/16" |
| ADJUSTABLE | - |
| HYDRAULIC | HYDRAULIC |
| ROCKER ARM STYLE | FULL ROLLER |
| SHIMS INCLUDED | YES |
| ROCKER MATERIAL | ALUMINIUM |
| SELF-ALIGNING | NO |
| MAX SPRING DIAMETER | 1.437" |
| MAX OPEN SPRING PRESSURE | <400lbs |
| INLET OFFSET | - |
| QTY | SET OF 16 |
| BRAND | ULTRALITE |
| NOTE | must measure Pushrod length. Will require 8.800" Pushrods when used with STD Cam & Lifters - Non Roller Engine |
