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Jesel Sportsman Steel Rocker System for Mast Black Label Large Bore "inline Pattern"
$ 2,630.00

Jesel Sportsman Steel Rocker System for Mast Black Label Large Bore "inline Pattern"


Only left in stock

This Jesel Rocker System is designed to be a direct bolt in for all Black Label Large Bore LS cylinder heads.  No special bolt pattern required. 

Kit includes rocker stand that utilizes the factory thread and pitch 8mm bolt.  This "inline" pattern rocker kit works well to retrofit any existing Black Label head to a better rocker system.

If you're looking for the ultimate endurance, we suggest using a Black Label "Jesel Pattern" head that uses larger rocker bolts., and a unique stand.


  • This kit comes in 1.7 & 1.8 rocker Ratio
  • For Inline Pattern - Retrofit Applications - 8mm Bolt
  • Rocker Material: Sportsman Steel
  • Large Bore Cylinder Heads
  • Made in USA

* This product ships directly from the manufacturer *

Jesel Engineers have combined all of the features of our Pro Aluminum Rockers with the durability of our Pro Steel Rockers. Jesel Sportsman Steel Rockers provide engine builders with the option of high strength steel rockers at an extremely affordable price and can be ordered separately or as an upgrade to certain Pro Aluminum rocker systems.

The Jesel Sportsman Steel Rockers are assembled with all of the proven components of our Pro Aluminum rockers. Featuring a .625" wide body with an ultralight slot to reduce weight and moment of inertia. They’re designed to be a direct replacement for the current Pro Aluminum bodies and will bolt to existing stands. Featuring a .360" wide non-needle valve tip roller and cup style tool steel adjuster, the rockers can be optioned with needle bearing nose rollers and ball style lash adjusters for high lift / high spring pressure applications. The rocker geometry is designed to minimize roller movement on the valve tip and each rocker body is manufactured from premium alloy steel. A through hardened heat treating process along with a black oxide coating will provide for years of dependable service and corrosion resistance.