PROX Forged Replica Piston Kit engineered for low friction and high reliability in demanding 4-stroke engines. Precision CNC-machined and built from a low-expansion forged aluminum alloy used by major Japanese OEMs.
PROX Forged Piston Kit is built for riders and engine builders who want OEM-level fitment with the added strength and consistency of a forged piston. Made from a specific low-expansion aluminum alloy, it helps reduce friction and supports long-term reliability under high load and heat. Each piston is precision CNC-machined on modern state-of-the-art equipment to deliver accurate tolerances and dependable performance.
If your engine is due for a top-end refresh, this kit helps restore compression and efficiency—keeping power delivery crisp while maintaining the durability you need for hard riding and racing.
✅ Forged aluminum-alloy construction designed to lower friction and maximize reliability✅ Precision CNC machining for accurate fit and consistent performance✅ Low-expansion alloy type used by major Japanese engine manufacturers
🔹 Strong forged design suited for demanding riding conditions and high thermal stress🔹 Helps bring back optimal compression and throttle response during a rebuild🔹 OEM-style “forged replica” fitment for straightforward engine servicing
📌 Brand: PROX📌 Vendor part number: 01.4351.B📌 Engine type: 4-Stroke📌 Piston diameter: 77.97 mm📌 Piston size: Standard Size B📌 Compression ratio: 14.1:1📌 Piston material: Forged aluminum alloy📌 Ring material: Steel📌 Unit: Kit
⭐ Built with a proven low-expansion alloy for stable clearances and reliable operation⭐ Precision manufacturing focused on durability and consistent engine performance⭐ Ideal choice for top-end rebuilds when you want dependable parts quality
