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* 420 Stainless Steel - Material thickness: 0
* Forward facing 90° velocity series intake
* Does NOT fit 2006 Dyna (These use 2007up Oiling Systems)
The Pinlock visor insert is made out of a material that contains moisture absorbing properties
* Includes wire seals (69201301) & terminals (69201300)
Std Pistons with 8.5:1 Compression Ratio. Fits Big Twin 1941-1979 with 1200cc Engine. MEM-MEB2035 * 420 Stainless Steel -Features & Benefits: * Bore = 3. 437" * Stroke = 3. 969" * 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 # 22141 55B * Replaces OEM # 22141 74A Tech Tips: * Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers Instructions.