MAHLE 224-3897WR-0.25MM Engine Piston Set with Rings 0.25mm Oversize

The MAHLE 224-3897WR-0.25MM is an OE-quality engine piston set featuring a 0.25mm oversize bore and includes matched piston rings for a complete, ready-to-install solution. MAHLE is one of the world's leading OE piston manufacturers, and this set delivers the same precision engineering found in original factory assemblies.

Key Features:

• Complete WR Set: Includes pistons with pre-installed piston rings, piston pin, and retaining clips — everything needed for engine assembly
• 0.25mm Oversize: Engineered for engines requiring a 0.25mm overbore, ideal for engine rebuilds where cylinders have been bored or honed
• OE-Matched Tolerances: Manufactured to the most stringent dimensional tolerances for proper fit and function
• Coated Skirts: Friction-reducing skirt coating minimizes wear and scuffing during initial break-in and long-term operation
• Compensated Ring Grooves: Designed to ensure proper ring loading and superior oil control
• Expansion-Controlled Design: Tight fitting clearances reduce engine noise, wear, and emissions
• High-Strength Piston Rings: Top rings feature high-velocity moly impregnation for superior compression sealing and durability
• Ni-Resist Top Grooves: Controls ring groove wear for extended service life
• Eutectic Aluminum Construction: Bonds effectively with ring land inserts to strengthen and better support the piston under load
• Balanced Set: Pistons are balanced as a set for smooth, vibration-free engine operation

MAHLE Original replacement pistons meet or exceed OEM specifications, making this set the trusted choice for professional engine builders and performance rebuilds alike. The 224-3897WR-0.25MM is sold as a complete set.