Mercedes-Benz AMG M178 Forged Internals| Rods & Pistons | YPG Motorsport

Mercedes-AMG M178 Forged Internals — Rods & Pistons Kit

The Mercedes-AMG M178 4.0L twin-turbo V8 is the performance-focused sibling of the M177, found exclusively in the AMG GT family. It shares the same 83mm bore and 92mm stroke as the M177 but uses a dry-sump oiling system for improved oil starvation protection under track conditions. Our M178 forged internals kit is specifically designed for the dry-sump architecture and pairs directly with the YPG Stage 4 M178 turbo system — the same combination that has demonstrated 1,200HP+ on pump fuel in our own builds.

What's Included:
Forged 4340 steel connecting rods — dry-sump compatible
Forged pistons — 83mm bore, optimised for forced induction
ARP head studs and rod bolts
Polished crankshaft
Compatible with YPG Stage 4 M178 turbo kit
Suitable for pump fuel, E30, E85, and methanol builds
Balanced and matched set — within ±1.5g

Compatible Vehicles:
AMG GT (2015–2023) — Coupe and Roadster
AMG GT S (2015–2023)
AMG GT C (2016–2023) — Coupe and Roadster
AMG GT R (2017–2023) and GT R Pro (2019–2023)
AMG GT Black Series (2020–2023)
AMG GT 63 S 4-Door E Performance (2018–2023)

Dry Sump Note:
The M178's dry-sump oiling system is a significant advantage for track use — it eliminates oil starvation during high-G cornering and braking that affects wet-sump engines. Our forged internals are designed and tested specifically for the M178's dry-sump architecture. All clearances and specifications are matched to the M178 block, not the M177. Do not interchange these kits.

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