+.040in. Dome Top Pistons with 9.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. - Keith Black Pistons Fuel Paks/Tuners & ECM's With over twenty years of

With over twenty years of evolution

* Designed for 88ci-106ci Engines with 9

040″ Head Gaskets &

Fuel Pump Top Gasket (Replaces OEM # 75301-07)

+.040in. Dome Top Pistons with 9.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. - Keith Black Pistons Fuel Paks/Tuners & ECM's With over twenty years ofFeatures & Benefits: * Bore = 3. 538 * Stroke = 4. 250 * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter piston to cylinder clearance. * Complete kit includes: two pistons, rings, wrist pins and clips. Tech Tips: * 9. 6: 1 Compression Ratio with 80cc Head Chamber Volume. * Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers