Developed by the engineers at PTG, the High Flow Manifolds are designed for drivers who demand more from the M177.1 platform. These manifolds deliver a dramatic increase in flow capacity over OEM manifolds. Unlocking higher boost levels, faster spool, and the headroom needed for serious power. PTG High Flow Manifolds provide a performance advantage without sacrificing OEM fitment. Whether you’re chasing faster track times or building a high-horsepower street setup, these manifolds are engineered to outperform. Significantly increased flow vs. OEM Mercedes manifolds Optimized runner and collector design for improved turbo response Supports higher boost and larger turbo setups with ease Cast construction for durability under extreme heat and pressure Designed and validated in-house by PTG engineers Direct bolt-on fitment for the M177.1 platformKey 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-Includes all Gaskets and Hardware for Easy Installation-100% Bolt-On Application