Pro Steel Series


Shaft Rocker Arms

Less Deflection. Less Fatigue.

About Jesel Pro Steel Series Shaft Rockers

Discover the pinnacle of engineered excellence with Jesel Pro Steel Shaft Rockers—designed specifically to handle the immense cylinder pressures of a 3000hp Pro Mod engine and strong enough to endure a grueling 24 hour road race with miles to spare. Thanks to advanced FEA analysis and precision engineering, our steel shaft rockers exhibit significantly less deflection and superior moment of inertia compared to traditional aluminum shaft rockers. This robust design supports more aggressive cam profiles, enhancing stability and performance under extreme conditions.

Engineered for Immense Cylinder Pressures
Ideal for turbocharged, supercharged, and nitrous-injected engines, Jesel Pro Steel shaft rockers thrive under high exhaust cylinder pressures where aluminum shaft rockers falter. Their exceptional fatigue resistance makes them perfect for demanding applications like oval track, road racing, and marine environments.

Innovative Features for Peak Performance
Each Jesel Pro Steel shaft rocker arm is CNC machined from premium steel and undergoes a rigorous heat-treatment process, ensuring resilience against rust and corrosion. These rockers are equipped with needle bearing valve tip rollers and full-complement needle shaft bearings with thrust washers, drastically reducing friction robbing horsepower and ensuring smooth movement throughout the lift cycle. Available with tool steel cup or ball lash adjusters to accommodate high lift applications.

Customizable to Your Specifications
Order Jesel Pro Steel shaft rockers as a complete kit or as replacement parts for your existing aluminum rockers. Looking for something unique? Our Custom Shop can design a set based on your specific requirements, including spring rates, lobe lifts, and pushrod angles.

Experience the Jesel difference with Pro Steel shaft rockers, where durability meets cutting-edge technology for ultimate engine performance.

Features & Options

  • Full complement needle bearing assembly operates with minimal lubrication while distributing load evenly over shaft surface.

  • Precision ground and heat-treated Tool Steel shaft provides years of durable service.

  • Increases clearance for valve cover while also reducing the rocker’s moment of inertia.

  • CNC machined, heat treated H-13 tool steel lash adjusters feature a nitride process for wear protection.

  • Provides a stable and rigid mounting surface for shaft rocker assembly.

  • .250” wide valve tip roller rotates on heavy-duty bearing steel needles to prevent the roller from stalling and skidding on the valve tip.

  • Bronze and/or hardened steel thrust washers are used to absorb heavy axial loads and prolong the life of the rocker shaft bearings.

  • Rocker kits include either ARP 2000 shaft bolts or ARP 8740 studs and nuts to secure the rockers to the mounting stands.

  • A light yet stiff heat-treated steel body engineered to handle extreme RPM along with intense open spring pressures.

  • Fully rebuildable to Jesel factory specifications through the Jesel CPR department.

  • Rockers can be ordered in various ratios to suit your specific engine build. Some applications are ratio limited.

  • Has less friction than cup type adjusters. Makes rocker arm stronger by increasing the adjuster thread area and eliminates counter-bore area.

Pro Steel Series Benefits

High Performance Stability
Supports the development of more aggressive cam profiles due to increased valvetrain stability.

Reduced Friction
Features needle bearing valve tip rollers and shaft bearings to minimize friction and maximize horsepower.

Enhanced Durability
Engineered to handle the extreme pressures of 3000hp Pro Mod engines.

Optimized for High Pressure
Ideal for engines using turbos, superchargers, or nitrous, handling excessive cylinder pressures effectively.

Superior Fatigue Resistance
Perfectly suited for endurance racing like oval track, road racing, and marine applications.

Advanced Engineering
CNC machined from premium steel, heat-treated, and coated to resist rust and corrosion.

Reduced Deflection
Offers less deflection and better moment of inertia compared to aluminum rockers.

Available Customization
Can be ordered as complete kits or replacements, with customizable options tailored through Jesel's Custom Shop.

Available Applications

AFR BBC, SBC, SBF
AFR LS1, LS3
All Pro 11°- 23° SBC
All Pro LS3, LS7
Brodix BBC, SBC, SBF
Brodix LS1, LS3, LS7

Chrysler W7
Dart BBC, SBC, SBF
Dart LS1, LS3
Dodge P7, P8
Edelbrock BBC, SBC, SBF
Edelbrock LS-R

Ford SBF, BBF
Frankenstein LS
GM BBC, SBC
GM LS1, LS3, LS7
GM SB2.2

GM DRCE 2, DRCE 3
Mast LS3, LS7
MBE BBC, SBC, SBF
MRH 18° BBC
Pro Stock

Pro Mod
Profiler BBC, SBC, SBF, BBF
TFS BBC, SBC, SBF, BBF
TFS LS1, LS3
TRD Phase 9/14

Our Rocker Story

When Chevrolet introduced its small-block V8 in 1955 one of its highly praised features was its lightweight stamped steel rocker system. With little more than a factory Duntov solid lifter cam a 7,000rpm redline was realistic. This economic valvetrain had its limits though. As long as mild seat pressures of around 100 pounds were used with low-lift hydraulic or flat tappet cams, life was good. As aftermarket cam manufacturers started grinding higher lifts, the rocker’s shortcomings began showing up. First, the rockers bottomed-out on the rocker studs because the slots were too short, then as spring pressures increased the studs pulled or broke out of the head bosses. The fixes came both from the aftermarket and GM.

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