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JIMS Big Axle™ Powerglide™ Tappets (Large Axle Tappet – Evolution) Upgrade your hydraulic tappet performance with JIMS Big Axle™ Powerglide™ Tappets engineered for precise cam lobe tracking and smoother operation. Built with JIMS’ Evolution design, these tappets deliver improved stability, reduced distortion, and tighter running fit for confident street performance. Key Features Micro-finish bore for a running fit of .0002" Big Axle™ rollers designed around three working parts for better control Outer wheel/roller wall size increased by 27% for less harmonic distortion and improved tracking Pin bearings reduced in size by 12% to help support higher RPM for precise tracking 36% larger axle doubles as the inner race—pin bearing and full roller assembly rotate around the axle, eliminating axle movement Made in the U.S.A. Specifications Units: Each Diameter: 0.8425" Material: Steel Product Type: Tappet Riding Style: Street Style: Hydraulic Weight: 0.38 lbs Dimensions: 4.09" x 1.14" x 1.14"
Micro-finish bore allows a running fit of .0002"
Big Axle™ rollers are designed around three working parts
The outer wheel/roller has a 27% greater wall size - less harmonic distortion for better tracking of cam lobe
Pin bearings are decreased in size by 12%, which increases rpm for more precise tracking
Axle size is increased 36% and doubles as the inner race, so the pin bearing and complete roller assembly now rotate around the axle instead of an inner race, eliminating all possible movement in and around the axle