Comp Cams Magnum, 270HR Mild Street Performance Increase, Noticeable idle Engine Tuning Do these work on my

Do these work on my vehicle's drum brakes

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The locking mechanism works in conjunction with proper torque

Comp Cams Magnum, 270HR Mild Street Performance Increase, Noticeable idle Engine Tuning Do these work on myHYDRAULIC ROLLER: Mild street performance increase. Slightly noticeable idle. Stock converter. Lifter Type: Hydraulic Roller Lifter Engine Family: Ford 289 302 C. I. 8 cyl. 1963 1995 Cam Family: Magnum Retro Fit Hydraulic Roller Camshafts, For engines that DID NOT come from the factory with hydraulic roller cams, NOT FOR E. F. I. Specifications RPM Range: 1800 5000 Valve Timing: 0. 006 Lobe Separation: 110 Intake Centerline: 106 Intake Exhaust Valve