TUNING RSS
M177 NANOSLIDE Bore Coating: What It Is and Why It Matters for Tuning
What Is NANOSLIDE and Why Does AMG Use It on the M177? Every AMG 4.0-litre V8 — from the C63 S to the GT R — relies on a twin-wire arc-spray (TWAS) bore coating that Mercedes-Benz brands NANOSLIDE. Instead of pressed-in iron liners, the M177 block receives an ultra-thin iron-carbon layer sprayed directly onto its aluminium cylinder walls. The result is a lighter block, lower friction, and a bore surface that laughs at heat. If you are planning a Stage 2 or Stage 3 build on any M177-powered AMG, understanding this technology is non-negotiable. It defines the ceiling of what...
C63 W205 Stage 3 Turbo Upgrade — 800 to 1,000HP M177 Build Guide (2026)
Why Stage 3 Is the Real Power Threshold on the M177 The Mercedes-AMG C63 W205 runs the M177 4.0-liter twin-turbo V8, and in factory form it delivers between 469 HP (C63) and 503 HP (C63 S). Stage 1 and Stage 2 ECU tunes push that number to roughly 550-700 HP by optimizing boost maps, fueling, and ignition timing. But once you want 800 HP or more, the factory turbos become the bottleneck. They simply cannot flow enough air. A Stage 3 turbo upgrade replaces the factory IHI turbochargers with larger, purpose-built units featuring billet compressor wheels, Inconel turbine wheels, and...