PTG X M177.1 / M178 Exhaust Manifold Set

Engineered by the team at PTG, the X-Manifold is built for enthusiasts chasing the limits. This manifold gives M177.1 owners the ability to run larger aftermarket/OEM M177.2 turbochargers originally designed for the E63, S63, and G63 engines with an 8.5:1 static compression ratio on the 10.5:1 compression M177.1 without compromise. 

Designed for those who build to break records, the PTG X-Manifold delivers the airflow, durability, and fitment required to support serious power goals.

Enables direct fitment of the larger 177.2 turbo onto 177.1 engines

Precision-engineered for maximum flow, response, and boost capacity

Ideal for high-performance builds aiming for extreme output 

Developed, tested, and validated in-house by PTG engineers

Key Features:
-Investment Cast Inconel 
-4 to 1 Collector Design
-59% Flow Increase with Replacement M177.1 Manifold
-74.5% Flow Increase with PTG-X Manifold System
-Ability to run PTG or Factory M177.2 Turbo on M177.1 Equipped Engines 
-Includes all Gaskets and Hardware for Easy Installation
-100% Bolt-On Application