Crower 72921-1 Features:

Crower 72921-1 rocker trunnion sleeve for 7/16 in. to 3/8 in. break-in rocker conversion Replacement sleeve used with Crower break-in rocker arms during initial engine startup Steps down a 7/16 in. stud to fit 3/8 in. rocker conversion applications Helps reduce the risk of premature cam and lifter break-in failures before final rocker installation

Rocker Trunnion Sleeve Fo For 7/16 In. To 3/8 Features:

• 7/16 in.-to-3/8 in. stud step-down sleeve for break-in rocker conversion applications and valvetrain setup support
• Replacement rocker trunnion sleeve for specialized break-in rocker arms during initial engine startup and component seating
• Helps reduce premature cam and lifter break-in failure risk by adapting 7/16 in. studs to 3/8 in. rocker fitment
• Single-piece service part for replacing an individual sleeve without purchasing a full engine set of conversion hardware
• Fits Crower 72921-1 break-in rocker conversion use, sold as each for targeted valvetrain maintenance and assembly