PROX Forged Piston (ref. 01.6367.A) — Designed for the preparation and revision of Cross engines, this forged aluminium piston offers a robust construction while maintaining controlled thermal behaviour. Its specific alloy is designed to limit friction and provide durability suited for off-road demands, ensuring a refurbishment equivalent to the original equipment.

• Type: Forged piston
• Diameter: Ø 87.96 mm (oversize letter A)
• Compression: standard 12.3:1
• Material: Aluminium
• Segments: kit (replacement segments ref. 260261)
• Universe: Cross / Enduro

This piston is aimed at riders and mechanics looking for a replacement part faithful to the original for their cylinder block. Ideal for preparing a 350 cm³ engine or refurbishing after a season, it fits many enduro/cross models, including KTM 350 EXC‑F SIX DAYS (2019), HUSQVARNA FE 350 (2019), and KTM 350 EXC‑F (2019).

Check the bore and oversize of your cylinder before installation. Manufacturer reference: 01.6367.A. For maintenance, plan for the replacement of the segments (ref. 260261) and check the piston/cylinder clearance during reassembly.