Keith Black Pistons KB305.010 +.010" Dome Top Pistons w/9.6:1 Compression Ratio for Big Twin 84-99 w/Evolution Engine There are also no visible

There are also no visible outer screws

- 6 Piston HHI Caliper Upgrade on stock 11

Adjusted for your comfort

• Steering control

Keith Black Pistons KB305.010 +.010" Dome Top Pistons w/9.6:1 Compression Ratio for Big Twin 84-99 w/Evolution Engine There are also no visibleDescription for Keith Black Performance Hypereutectic Piston Kit, 3. 508" Bore, 9. 6: 1 Manufactured from high strength, t 6, heat treated, 390 hypereutectic aluminum alloy Allow a tighter fit and longer piston and ring life Diamond machined pistons are held to plus or minus one gram weight and less than on half thousandth inch (. 0005) tolerances from piston to piston Includes two pistons, pins, spiro lock pin clips and Hastings moly rings . 010 over