AMG Tuning RSS
M177 HPFP Upgrade Guide: 250bar vs 350bar — Which High Pressure Fuel Pump Kit Do You Need?
The stock high-pressure fuel pump on the Mercedes-AMG M177 4.0L V8 BiTurbo is the first component to hit its limit when you push beyond factory power. Whether you're running a Stage 2 ECU calibration, upgraded turbos, or ethanol-blended fuels, the OEM HPFP cannot deliver enough volume to maintain stable rail pressure — and that means lost power, misfires, or worse. This guide covers everything you need to know about upgrading the HPFP on the M177 platform: what the stock system's limits are, how 250bar and 350bar kits compare, which models fit, and what supporting modifications you need. Why the Stock...
The M177 Engine: A Complete Technical Guide to AMG's 4.0L Twin-Turbo V8
Mercedes-AMG E63 S (W213): The Complete Technical Platform Guide
Mercedes-AMG E63 S W213 Downpipe Guide — Catless vs 200-Cell, M177 Power Gains, Sound & Installation (2026)
The downpipe is the single highest-impact bolt-on modification you can make to the Mercedes-AMG E63 and E63 S. On the M177 4.0-liter twin-turbo V8, the factory catalytic converters sit directly downstream of the turbochargers — creating a massive restriction right where exhaust gas velocity is highest. Replacing them with aftermarket downpipes is how you go from a fast sedan to a 10-second quarter-mile car.This guide covers everything you need to know before buying downpipes for your W213 E63: catless versus 200-cell high-flow cats, real-world power gains, exhaust sound changes, fitment across all body styles, installation, and why a Stage 2...
M177 LS1 vs LS2: Every Difference Between AMG's 4.0L V8 Engines
M177 LS1 vs LS2 at a Glance Specification LS1 (C63) LS1 S LS2 (E63) LS2 S Power (HP) 469 503 563 603 Torque (Nm) 650 700 750 850 Compression 10.5:1 10.5:1 8.6:1 8.6:1 Turbo Type Mono-scroll Twin-scroll Max Boost (bar abs.) 1.9 2.1 2.3 2.5 Peak Power RPM 5,500–6,250 5,750–6,500 Max Fuel Pressure 200 bar 200 bar Transmission MCT 7-speed MCT 9-speed (725.0) Drivetrain RWD 4MATIC+ (variable AWD) The Mercedes-AMG M177 is a 4.0-litre twin-turbocharged V8 used across the modern AMG lineup — but not every M177 is created equal. The LS1 and LS2 power levels share displacement, bore, stroke,...