CMI Precision Billet Roller Rocker Arm Kit — 1.5:1 Ratio | Air-Cooled VW

CMI Precision Billet Roller Rocker Arm Kits (2025 Edition)

Race-Proven Performance. Advanced Lubrication.

The all-new 2025 CMI Billet Roller Rockers are the most advanced valvetrain assemblies available for the VW industry. Extensively track-tested by top drag racing teams, these kits are engineered to survive extreme lift and high RPM while keeping your valvetrain cool.

Key Engineering Upgrades:

• Forced-Feed Oiling: Oil is now force-fed through the pushrods to the DLC-coated shafts and sprayed directly onto the roller tips. This constant lubrication helps cool the valve springs and reduces friction.

• Superior Materials: Rocker arms are machined from 7050-T651 Aluminum, hard-anodized with a Teflon seal for maximum durability.

• Low-Friction Shafts: Manufactured from 9310 Steel with a high-tech Diamond-Like Carbon (DLC) coating.

• Heavy-Duty Hardware: Includes 3/8" H13 Tool Steel adjusting screws, ball cups, and Titanium 12-point lock nuts.

• Rock-Solid Mounting: Secured by Grade 12.9 studs and 7075-T651 Aluminum rocker blocks and spacers.

Ratio Identification:

CMI uses color-coded anodized end caps for quick identification:

• Blue End Caps: 1.4:1 Ratio Assemblies

• Black End Caps: 1.5:1 Ratio Assemblies