+.020in. Dome Top Pistons with 10.5:1 Compression Ratio. Fits Big Twin 1984-1999. - Keith Black Pistons Engine Mounts & Jiffy Stands * Integrated crossbar for added

* Integrated crossbar for added rigidity & for use as a wire guide

these don’t require gaskets

* HHI-WGCK-C02 for XL 2004-2007

* Carbon fiber woofer cone

With the introduction of “big wheels” to this iconic platform

+.020in. Dome Top Pistons with 10.5:1 Compression Ratio. Fits Big Twin 1984-1999. - Keith Black Pistons Engine Mounts & Jiffy Stands * Integrated crossbar for addedFeatures & Benefits: * Bore = 3. 518 * Stroke = 4. 250 * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined * Best resistance to cracking in hi comp performance applications * Require . 001 wider piston to wall clearance. * Complete kit includes: two pistons, rings, wrist pins and clips. Tech Tips: * 10. 5: 1 Compression Ratio with 80cc Head Chamber Volume. * Follow Ring End Gap & Piston to Cylinder