+.010in. Dome Top Pistons with 10.5:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. - Keith Black Pistons BT'93-17 CV Carb/Delphi EFI (cable) * Replaces factory small 2-1/8″

* Replaces factory small 2-1/8″ gauge (usually ambient air temperature gauge)

* Includes ABS Upper brake line adapter # MS-AS37026

* Plug and play installation with no drilling

* Fits most M8 Touring 2017up

Injectors also fit performance XL engines looking for a higher flow rate

+.010in. Dome Top Pistons with 10.5:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. - Keith Black Pistons BT'93-17 CV Carb/Delphi EFI (cable) * Replaces factory small 2-1/8″Features & Benefits: * Bore = 3. 508 * 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: * 10. 5: 1 Compression Ratio with 80cc Head Chamber Volume. * Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers