Grimmspeed Post MAF Hose Kit Black 2015-2021 WRX

Upgrade your intake system with GrimmSpeed’s Post MAF Hoses, engineered to improve airflow over the OEM design.

Quick Specs:

• 4-Ply Stainless Steel-Reinforced Silicone – durable, flexible; red or black
• OEM Fitment – direct replacement, no modifications needed
• CAD-Optimized Seamless Flow – maximizes turbo efficiency
• High-Quality Breeze Hose Clamps Included
• No Tuning Required – pairs perfectly with GrimmSpeed DRY-CON Panel Air Filter

GrimmSpeed hoses feature two major enhancements:

1. Smooth Inner Surface – Eliminates the pockets from OE corrugated folds. Constructed from 4-ply silicone with an internal stainless steel wire, they remain flexible, structurally strong, easy to install, and resist collapsing under vacuum.
2. Tapered Ends – Precisely match OEM air box and turbo inlet diameters to prevent airflow disruption and vortex formation, ensuring consistent turbo feed.

Methodology:
OEM hoses rely on corrugated folds and sharper bends, creating uneven airflow and pressure spikes. GrimmSpeed hoses maintain minimal curve transitions and smooth inner walls, delivering consistent flow and reduced turbulence throughout the post-MAF section.

Installation Instructions