MAHLE 224-3540 Engine Piston Set — Flat Head, Standard Size

The MAHLE 224-3540 is an OE-quality replacement engine piston engineered for the GM 5.7L LS1 V8 engine at standard bore. Manufactured by MAHLE — one of the world's largest OE piston suppliers — this cast aluminum piston is precision-machined to meet original equipment form, fit, and function requirements, making it a trusted choice for engine rebuilds and overhauls.

Featuring a flat-top piston design with no valve reliefs and a standard bore diameter of 3.898 in. (99.00mm), this piston delivers the same performance characteristics as the factory part. The press-fit wrist pin design and 1.328 in. compression height ensure precise engine geometry is maintained during assembly.

Key Features:

• Bore Diameter: 3.898 in. (99.00mm) — Standard size
• Compression Height: 1.328 in.
• Stroke: 3.622 in. — Stock stroke type
• Piston Style: Flat top, no valve reliefs
• Material: Cast aluminum for lightweight, durable performance
• Wrist Pin Style: Press-fit
• Piston Rings: Not included — sold separately
• MAHLE GRAFAL® Anti-Friction Skirt Coating: Graphite-impregnated resin coating reduces drag, scuffing, friction, and cylinder bore wear
• Compensated Ring Grooves: Engineered to ensure proper ring loading and consistent oil control
• Expansion-Controlled Design: Tight fitting clearances reduce engine noise, wear, and emissions

MAHLE Original OE replacement pistons are precision-machined to exacting tolerances, delivering a lightweight design that reduces reciprocating mass without compromising reliability. The result is reduced bearing loads, smoother engine operation, and improved engine response — all backed by MAHLE's decades of OE development expertise.