Minimizing piston ring friction 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 for a quantitative measurement of friction as a function of gap and diameter. Get it right and get the trophy! Includes two expandable platforms for pulling, and a precision digital gauge for accurate readings. Sold individually. U.S. Pat. 8.479.570
Product Details:

• Piston Ring Friction Measuring Tool
• 0-12 LB Digital Gauge
• 0.1 oz Resolution
• Patented Adjustable Adapters Fit Bores 2.377-6.250 Inches
• Includes Foam Lined Hard Shell Case
• Sold As Each