Stud Mount
Traditional stud mount rocker designed to either use original factory 3/8" press-in studs or 'screw in' 3/8" UNF x 7/16" UNC (YT 18530 - 12 Set) aftermarket rocker studs.
Note:
- If fitting screw in aftermarket studs (YT 18530), machining is required.
- When fitting to Ford Essex V6 Engine with Press In Studs - Stud may need to be lowered for adequate posilock engagement.
Street Terra
The best value rocker arm on the market today. Engineered to meet or exceed the needs of performance street and sportsman race applications.
Our vacuum die cast arm is designed and engineered for optimum strength without the costs associated with billet CNC machining. The Street Terra series utilises the extreme duty hardware from our premium Platinum race series - ensuring a lifetime of trouble free performance. Our easy-fit (EF) kits are a cost effective alternative for factory stamped steel rocker arms, which can be installed within less than an hour without cylinder head removal and in most cases without machining.
Our wide range of true ratios allows you to achieve high lift without relying solely on your camshaft… a trend many engine builders and racers alike are adopting to relieve the inertia on lifters and pushrods generated by aggressive and often violent ramp rates required to make big lift.
Popular amongst standard rebuilds where OEM equipment is worn and or scarce, as well as mild street applications.
Why Choose Street Terra?
- Vacuum die-cast arms built to withstand 450 lbs* max open spring pressure
- Oversize full-complement caged bearings designed for oscillating (rocking) loads, paired with oversize precision ground trunnions to reduce friction.
- Various ratios available, catering for every camshaft grind. High ratios allow for additional lift on stock and aftermarket camshafts.
- 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.
Fitment Notes:
HOLDEN 6 & FORD ESSEX - MAX LIFT .400"/Not recommended for High-Lift Cams
FORD ESSEX - Taller Rocker Covers are required - may be able to use 2 cork gaskets for clearance. For optimum fitment and customers using High-Lift Cams/it is recommended to run YT 5016 (Ford Essex).
Tech Specs:
| PART NO | ST 2007 |
| BRAND | STREET TERRA |
| APPLICATION | FACTORY REPLACEMENT/STREET |
| MAX OPEN SPRING PRESSURE | 450 lbs |
| MAKE | HOLDEN/FORD |
| ENGINE | HOLDEN 149, 161, 179, 186. FORD ESSEX V6 |
| MOUNTING STYLE | STUD MOUNT |
| ROCKER ARM RATIO | 1.5 |
| STUD SIZE | 3/8" |
| ADJUSTABLE/HYDRAULIC | ADJUSTABLE (POSILOCK) |
| ROCKER ARM STYLE | FULL ROLLER |
| ROCKER MATERIAL | ALUMINIUM |
| ROCKER ARM BODY STYLE | VACUUM DIE-CAST |
| ROCKER ARM NUT STYLE | POSILOCK |
| MAX SPRING DIAMETER | 1.437" |
| INLET OFFSET | NO |
| QTY | SET OF 12 |
| NOTE |
MAX LIFT .400" / NOT RECOMMENDED FOR HIGH LIFT CAMS FORD ESSEX - TALLER ROCKER COVERS REQUIRED WHEN FITTING TO FORD ESSEX V6. MAY BE ABLE TO USE 2 CORK GASKETS FOR CLEARANCE |
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Holden 6 roller rockers
I have been using Yella Terra products for over 40 years and like all the items I have used these are first class.
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ST2007 roller rockers red six
very prompt delivery. I fitted the roller rockers to a 186 based old school bathurst 6000 yellaterra head. Very simple to fit a straight swap for the standard rockers. As it is a 186 head there was no need for guide plates and they fitted under a standard rocker cover (just)
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great service
fast efficient service great advice thanks
