+.010in. Dome Top Pistons with 8.3:1 Compression Ratio. Fits Big Twin 1978-1984 with 1340cc Shovel Engine.

+.020in. Dome Top Pistons with 8.2:1 Compression Ratio. Fits Sportster 1972-1985 with 1000cc Engine.

KEITH BLACK PISTONS PISTONS BT84-99 EVO +.030 10.5:1

Std Dome Top Pistons with 10.5:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.

+.040in. Flat Top Pistons with 9.0:1 Compression Ratio. Fits Sportster 1986-2021 with 1200cc Engine & Sportster 1986-1987 with 1100cc Engine.

+.070in. Pistons with 8.5:1 Compression Ratio. Fits Big Twin 1941-1979 with 1200cc Engine.

KEITH BLACK PISTONS PISTONS BT41-79 +.050 8.5:1

+.040in. Pistons with 8.5:1 Compression Ratio. Fits Big Twin 1941-1979 with 1200cc Engine.

+.030in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.

+.020in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.

+.010in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.

+.005in. Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.

Std Flat Top Pistons with 8.6:1 Compression Ratio. Fits Big Twin 1984-1999 with Evo Engine.

KEITH BLACK PISTONS REPLACEMENT RING SET

KEITH BLACK PISTONS REPLACEMENT RING SET

KEITH BLACK PISTONS REPLACEMENT RING SET

KEITH BLACK PISTONS REPLACEMENT RING SET

KEITH BLACK PISTONS REPLACEMENT RING SET

KEITH BLACK PISTONS REPLACEMENT RING SET

KEITH BLACK PISTONS REPLACEMENT RING SET

KEITH BLACK PISTONS REPLACEMENT PISTON PIN

KEITH BLACK PISTONS REPLACEMENT PISTON PIN

KEITH BLACK PISTONS REPLACEMENT PISTON PIN