CP Carrillo BHM8124-4 Milwaukee-Eight 124ci Forged Piston Kit 4.250" Bore 11:1 CR

The CP Carrillo BHM8124-4 is a high-performance forged piston kit engineered for Harley-Davidson Milwaukee-Eight 124ci engines. Featuring a 4.250" bore, 4.375" stroke, and 11:1 compression ratio with a -4cc dome, this kit is purpose-built to maximize power output and durability in performance Milwaukee-Eight builds.

CP-Carrillo manufactures these pistons in the USA from high-strength 2618 forged alloy — the same material used in professional racing applications. Each piston is fully CNC machined and precision balanced to within +/- 1 gram for smooth, high-revving performance. Double forced pin oilers ensure consistent lubrication to the wrist pin under demanding conditions.

Kit Specifications:

• Bore: 4.250"
• Stroke: 4.375"
• Displacement: 124 cubic inches
• Compression Ratio: 11:1
• Dome Volume: -4cc (flat top)
• Material: 2618 forged aluminum alloy
• Fully CNC machined
• Balanced to +/- 1 gram
• Double forced pin oilers

Kit Includes:

• 2 forged pistons
• Ring sets
• Wrist pins
• Wrist pin clips

Designed for maximum performance, horsepower, and long-term reliability, the BHM8124-4 is an ideal choice for Milwaukee-Eight big bore engine builds. Follow the supplied instructions for proper ring end gap and piston-to-cylinder clearances during assembly.