PLEASE NOTE FOR HIGH RPM OR RACE APPLICATIONS USE YT 6779A
Designed fror Volvo B20 engines and interchangavle with Volvo B18 engines (may required minor modifications) - MODULAR SHAFT MOUNT SYSTEM FOR ADDED STRENGTH & STABILITY WITH BALL ADJUSTERS 3/8" UNF - 5/16"
Pro Street
Designed for high revving street/strip applications. No other comparable product can compete with our valve train stability and reduced valve train component wear whilst retaining factory size bolt-down hardware.
Manufactured and assembled in Australia using the highest quality materials and componentry consistent with those found in our Platinum Race Series.
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.
Ideal for harsh street and strip applications, these rockers have got what it takes to last!
Why Choose Pro Street?
- 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.
- Intricately balanced CNC billet arms ensuring vital valvetrain stability - focusing attention on the harmony of the entire engine.
- 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.
- 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.
Item Specifics - Check Valve Cover Clearance/Valve Cover Spacer or Higher Covers may be required depending on setups
| PART NO | YT 6674A |
| BRAND | PRO STREET |
| APPLICATION | STREET/STRIP |
| MAX OPEN SPRING PRESSURE | 450LBS |
| MAKE | VOLVO |
| ENGINE | B18,B20 |
| MOUNTING STYLE | MODULAR SHAFT |
| ROCKER ARM RATIO | 1.65 |
| STUD SIZE | 5/16" |
| ADJUSTABLE/HYDRAULIC | ADJUSTABLE |
| ROCKER MATERIAL | ALUMINIUM |
| ROCKER ARM BODY STYLE | CNC BILLET |
| NOTE |
TOTAL ROLLER ROCKER SYSTEM INCLUDES: CRADLES, SHAFTS, ARMS AND 0.310" BALL END ADJUSTERS. MAY REQUIRE CUSTOM LENGTH PUSHRODS OPTIONAL: 0.340" (8.6mm) BALL END ADJUSTERS AVALIABLE. REFER TO YT 18009 (STANDARD) OR YT 18033 (CROSSHOLE) |
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Roller Rockers
Very well constructed( significant boost in usable power for the same cam) I only needed to get different length push rods. From Comp Cams and that was easy
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Roller Rockers and integral shaft
Totally amazed at the resilience, power increase, and greater tractability this product provides!!! I should have written this review months ago, but only just now got around to it. Installed in a 2.5 highly engineered balanced and blueprinted B-20 with an F head, double valve springs, oversized valves, chamfered valve guides, satellite valves, 11.5-1 CR, etc. Direct port nitrous, direct port Aquamist, J&S nock sensor, twin side draft 40DCOE Webers L, limslip, Accusump, electric fans, Davies digital electric water pump etc. But the roller rocker gear was really the icing on the cake. Even more amazing was that the Volvo high performance push rods w/lightened Chevy style lifters were apiece of cake to install. Thanks so much for a great product!!
