Race Turbo RSS
Stage 3 vs Stage 4 Race Turbo Upgrade — Which One Do You Need? (M177 / M178 AMG)
If you've already pushed your Mercedes-AMG past Stage 2 — ECU tune, downpipes, maybe an intercooler — and you're sitting in the 600–700HP range, the next step is turbocharger hardware. The factory turbos are tapped out. But which turbo upgrade makes sense for your build: Stage 3 or Stage 4 Race Turbo? This guide breaks down the differences between the two turbo upgrade tiers YPG Motorsport offers for the M177 and M178 4.0L twin-turbo V8, covering power targets, required supporting mods, cost, and which build path each upgrade is designed for. Stage 3 Turbo Upgrade — The Street and Track...