PTG X M177.1 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 engineersKey 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