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* Magnetic Plug
* This seat looks great with our stitch graphics
* Nickel plated for corrosion & wear resistance
* Check Crankshaft run-out using Jim’s Tool # JM-785
* Replaces OEM # 30605-48 & 32726-30A
+.030in. Dome Top Pistons with 8.2:1 Compression Ratio. Fits Sportster 1972-1985 with 1000cc Engine. P00511800 * Magnetic PlugFeatures & Benefits: * Bore = 3. 218" * Stroke = 3. 812" * Fits Iron Head Sporty. * 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. * Replaces OEM # 22255 83 Tech Tips: * 8. 2: 1 Compression Ratio with 110cc Head Chamber Volume. * Follow Ring End Gap & Piston to Cylinder