Custom forged pistons for the Mercedes-AMG GL63 and GLS63 (X166) — purpose-built for the M157 5.5L twin-turbo V8 to handle extreme boost, timing, and cylinder pressures far beyond factory limits.
When pushing the M157 past 700–800+ HP, factory cast pistons become the weak link. Our forged piston set is designed for builds running upgraded turbos, aggressive tuning, and race fuel — delivering the strength needed to survive sustained high-boost operation without the full cost of a complete forged internals kit.
What's Included
- 8x Forged Pistons — 4340 aircraft-quality forged aluminum, precision-machined to OEM bore specifications for the M157 5.5T V8
- Piston Rings — Low-tension performance ring pack for improved sealing under boost and reduced friction
- Wrist Pins & Clips — Heavy-duty tool steel wrist pins rated for extreme cylinder pressures
Key Features
- Ceramic-Coated Tops — Thermal barrier coating reduces heat transfer to the piston crown, protecting against detonation at high boost levels.
- Teflon-Coated Skirts — Anti-friction coating reduces piston-to-wall contact friction, improving reliability and reducing wear under sustained high-RPM operation
- Factory Compression Ratio — Maintains stock compression geometry for seamless integration with OEM or aftermarket ECU calibrations
- 1,500HP+ Rated — Engineered to withstand cylinder pressures generated by Stage 3+ turbo upgrades and aggressive ignition timing.
Compatibility
- Mercedes-AMG GL63 (X166) — 2013–2016
- Mercedes-AMG GLS63 (X166) — 2017–2019
- Engine: M157 5.5L Twin-Turbo V8 (DE55 AL)
Why YPG Motorsport?
YPG Motorsport has built and tuned M157-powered AMGs since 2011 — from bolt-on turbo upgrades to full forged engine builds. Every kit is sourced from CP-Carrillo or equivalent tier-1 forging houses and inspected before shipping.
Ships worldwide via FedEx International Priority from Kuwait.
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