+.005in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. - Keith Black Pistons Luggage Racks & Associated Parts O-Ring Chain # BC-19-7286 &

O-Ring Chain # BC-19-7286 & Clip Link # BC-19-7303 & Locknut # PBI-291

* Finished off with our popular Tradition end caps

* Replacement Bosch LSU 4

* Lowrider Twin Ga

* Replacement Air Filter Element = AN-81-110

+.005in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. - Keith Black Pistons Luggage Racks & Associated Parts O-Ring Chain # BC-19-7286 &Features & Benefits: * Bore = 3. 503 * 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. * Replaces OEM # 21941 83 Tech Tips: * 8. 6: 1 Compression Ratio with 80cc Head Chamber Volume. * Follow Ring End Gap & Piston to Cylinder Clearances as per the