Pro Aluminum Series
SHAFT ROCKERS
Custom Built to Your Specifications
Trusted by Champions
From NHRA Pro Stock to Sprint Cup, Jesel Pro Series shaft rockers are the trusted choice for championship winning racers. Engine builders worldwide rely on Jesel rockers, acclaimed for setting the gold standard in high-performance valvetrain technology.
Superior Strength and Lightweight Design
Engineered with an exclusive custom blended 7000 Series aluminum alloy, Jesel Pro Series shaft rockers offer exceptional durability without compromising weight. Tensile strength of our custom blended alloy at 300° far exceeds that of the less expensive, industry standard 2024 alloys. Low moment of inertia along with FEA designed bodies ensures that lobe lift is not wasted due to rocker body deflection.
Customizable for Optimal Performance
Jesel understands that precision customization is key to achieving peak performance. Our Pro Series shaft rocker systems can be tailored to meet specific racing requirements, including adjustments in rocker ratio, adjuster offset, and lightening options. Standard features such as a shotpeened surface finish, a profiled rocker tail, and a clipped-pin nose roller enhance durability and performance. Additionally, rocker stands can be custom-ordered to suit engines with longer than stock valve lengths, ensuring a perfect fit for every race engine.
Elevate Your Race Engine with Jesel Pro Series Shaft Rockers
Choose Jesel Pro Series shaft rockers to elevate your race engine's performance to championship levels. Explore the possibilities and customize your components to suit your racing needs, and step into the winner's circle with Jesel, the leader in valvetrain innovation.
Available Rocker Bodies
A. Solid Body
1.650 Pivot BB Rocker / Weight: 210g
Our strongest rocker body. Intended for use with high cylinder pressure applications such as nitrous and blowers.
B. Mohawk Beam
1.650 Pivot BB Rocker / Weight: 195g
Our stiffest lightweight body. Lowest moment of inertia ideal for extremely high RPM valve control and extended spring life.
C. Standard Slot
1.650 Pivot BB Rocker / Weight: 202g
Our default lightening program. Provides for a stiff body capable of controlling the valvetrain at high RPM.
Jesel Pro Aluminum Series Features & Options
Standard Shot Peen Finish
Induces an even, compressive stress layer in the surface of the rocker body. Increases the resistance to fatigue failures. Adds compression strength and stress relieves rocker body.
Optional Ball Adjuster
Has less friction than cup type adjusters. Makes rocker arm stronger by increasing the adjuster thread area and eliminates counterbore area.
Optional ARP Shaft Bolts
Manufactured from ARP 2000 material, these bolts can be torqued to 35 ft lbs and are recommended for spring pressures exceeding 800lbs. open.
Optional Needle Roller
Recommended for use with high lift, high spring pressure applications. Prevents the roller from stalling and skidding across the valve tip. Highly recommended when using .312” or smaller valve stems.
Tool Steel Ball & Cup Adjusters
All of Jesel’s lash adjusters are machined in house using high grade H-13 Tool Steel. They are then heat treated and finally put through a nitriding process to apply a hardened case on the parts for wear protection.
Optional Needle Rollers
Recommended for use with high lift, high spring pressure applications. Prevents the roller from stalling and skidding across the valve tip. Highly recommended when using .312” or smaller valve stems.
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.
