Sportsman Aluminum Series
SHAFT ROCKERS
No Modification / No Aggravation
Tired of Constantly Adjusting Your Stud Rockers? Upgrade to Jesel Sportsman Series Rockers
Are you still spending frustrating hours adjusting your stud rockers, only to find yourself repeating the process again the next weekend? If so, Jesel Sportsman Series Rockers offer a robust solution. Launched in 2001, these rockers have quickly become the go to choice for replacing inefficient stud rocker assemblies in both OEM and aftermarket cylinder heads.
Optimized for High Performance
Designed specifically for naturally aspirated engines, Jesel’s Sportsman Series Rockers are crafted from high quality 2024 aluminum. These shaft rockers are capable of withstanding open spring pressures of up to 900 lbs, all while maintaining precise valve lash settings. This makes them ideal for a variety of demanding applications—from daily driving and bracket drag racing to high stakes marine and oval track competitions.
Years of Reliable, Maintenance-Free Performance
Engine builders and racers alike have experienced years of dependable, maintenance free performance with Jesel Sportsman Series Rockers. Their robust design ensures long lasting reliability under the most strenuous conditions.
Easy Installation with Minimal Modifications
Jesel Sportsman Series Rocker Kits are engineered for easy installation, requiring little to no modifications to the cylinder head. In most cases, these rockers can even fit under the stock valve cover. The rocker geometry is pre set, crafted to align with the common valve specifications of each specific cylinder head, ensuring a straightforward, bolt on installation process.
State-of-the-Art Manufacturing for Fast Delivery
Thanks to Jesel's advanced CNC machining centers and a meticulously controlled manufacturing process, these cost effective, specially engineered rocker systems can be shipped directly to your door just days after you place your order. This quick turnaround means less downtime for your engine and more time on the road or at the track.
Sportsman Series Benefits
Increased Horsepower: Reduced friction over stud rocker arms helps to create additional horsepower.
Stable Valvetrain: Ensures an extremely stable valvetrain at any RPM, enhancing overall engine efficiency.
Optimized Geometry: Corrects rocker geometry, diminishes guide wear, and maintains lash, improving engine longevity and performance.
Cost and Time Efficient: Saves money and time by significantly reducing the frequency of necessary engine maintenance.
High Durability: Crafted from 2024 aluminum to withstand up to 900 lbs of open spring pressure.
Versatile Applications: Ideal for a range of high performance scenarios, from daily drivers to competitive racing environments.
Easy Installation: Designed for bolt on application with little to no modifications needed, compatible under most stock valve covers.
Quick Delivery: Leveraging advanced CNC machining for rapid production and delivery, minimizing downtime.
Sportsman Series Standard Features
Shaft Needle Bearings
Full compliment needle bearing assembly operates with minimal lubrication while distributing load evenly over shaft surface.
Clip Pin Nose Roller
Securely retained .520” diameter Tool Steel Nose Roller operates with less friction and decreased valve guide wear.
Centerless Ground Shafts
Precision ground and heat treated Tool Steel shaft provides years of durable service.
Shotpeen Finished
Machined from custom blended 2024 aluminum designed to resist fatigue from stress and hot operating conditions.
Valve Spring Relief Pocket
Ball mill machined to provide additional clearance between rocker body and valve spring. SB systems clear up to 1.550” spring and BB systems clear up to 1.625” spring.
Billet Steel Stand
Provides a stable and rigid mounting surface for shaft rocker assembly.
Profiled Rocker Tail
Increases clearance for valve cover while also reducing the rocker’s moment of inertia.
Tool Steel Lash Adjusters
CNC machined, heat treated alloy steel lash adjusters have been proven through years of abuse in our Pro Series Rockers.
Available Applications
Air Flow Research
Alan Johnson
All Pro Heads
Brodix
Canfield
CFE
Chevrolet
Chrysler
Dart
Edelbrock
Flo-Tec
Ford
Liberty
Patriot
Pontiac
PRC
Pro Comp
ProFiler
ProMaxx
Pro Topline
Racer Pro
RHS
Trick Flow
World Products
Sportsman Series Stand Link
This patented stand link, ( U.S. Patent 7,028,653 B2 ) designed for Big Block Chevrolet kits, orientates the CNC machined steel rocker stands and aligns the rocker roller squarely with the valve tip. The stand link also acts as a safety guide in the event of a loose bolt.
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.
