Wiseco WK1642 1340 Evo BT Piston Kit +0.020" for Harley-Davidson

Stock replacement forged piston kit.
Series compression ratio: 8.5:1.
Includes Hastings rings, circlips and bolts.
Note: Also compatible with Evo BT models equipped with Screamin' Eagle cylinder heads, which offer a compression ratio greater than 9.5:1.

Fits: 1340cc Evo Big Twin (models > 84-99)