All the top race crews know that minimizing piston ring friction to the lowest amount before blow by is one of the best ways to maximize engine efficiency. This tool accurately measures the pull of a ring in the bore. This is the ultimate tool for quantitatively measuring friction as a function of gap and diameter. Get it right, and get the trophy! The kit includes two expandable platforms for pulling, and a precision digital gauge for accurate readings. Tool fits ring bore diameters between 2.377"-6.25". Detailed instructions included. U.S. Pat. 8,479,570

Features:
0-12 LB Digital Gauge
  • 0.1 oz Resolution
  • Patented Adjustable Adapters Fit Bores 2.377"-6.250"
  • Includes Foamed Lined Hard Shell Case
  • PROFORM Parts Brand Product
  • Sold Individually
  • More From This Category

    Proform , Carburetor Power Valve Single Stage Model, High-Flow, 4.5 Hg

    Proform , Carburetor Power Valve Single Stage Model, High-Flow, 4.5 Hg

    $23.86

    Proform , Extended T-Bar Style Nuts , Wide Ends for Load-Distribution/Vacuum Leak Protection

    Proform , Extended T-Bar Style Nuts , Wide Ends for Load-Distribution/Vacuum Leak Protection

    $26.79

    Proform , Chevrolet Big-Block Slant-Edge Valve Covers, Powder Coat Ready; Tall; Raised Emblems

    Proform , Chevrolet Big-Block Slant-Edge Valve Covers, Powder Coat Ready; Tall; Raised Emblems

    $593.01

    Proform , Chrysler Starter 4.41:1 Gear Reduction, Chrysler Small & Big Block V8 Engines

    Proform , Chrysler Starter 4.41:1 Gear Reduction, Chrysler Small & Big Block V8 Engines

    $367.28

    Proform , Ford Auto Trans Starter 2.2KW; 15:1 Ratio, For Ford Small & Big Block V8 Engines; 221- 351W and 460 Engines

    Proform , Ford Auto Trans Starter 2.2KW; 15:1 Ratio, For Ford Small & Big Block V8 Engines; 221- 351W and 460 Engines

    $502.40