Std Dome Top Pistons with 10.5:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. - Keith Black Pistons Dyna Solo Seats * Patent Pending LS275 Baffle

* Patent Pending LS275 Baffle Designed for Best Sound and Power

* Includes Instructions

* For Matching Shiftpeg use TS-TSC-2101-2

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great sound

Std Dome Top Pistons with 10.5:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine. - Keith Black Pistons Dyna Solo Seats * Patent Pending LS275 BaffleFeatures & Benefits: * Bore = 3. 498 * 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