GrimmSpeed Post MAF Hose Kit Black - 2002-2007 Subaru WRX / STI
This is the GrimmSpeed Post MAF Hose Kit. This post-MAF hose combines durable multi-layer silicone fiber and smooth interior walls and CAD technology that makes for an excellent high-performance upgrade over the factory OEM post-MAF hose. This is achieved by eliminating the pockets and corrugated folds in the OEM design to improve the overall flow and throttle response. GrimmSpeed Post MAF Hose Kit Black TECHNICAL: Reinforced silicone construction The design removes the OEM corrugated folds and the pockets to create a smooth interior wall Designed with a tapered center portion to make sure the diameter matches the OEM air box and turbo inlet The design eliminates mismatched hose diameter which can create steps that will cause airflow trajectories and small vortexes The shape of the hose was optimized through CAD Flow Simulation Testing to generate a smoother flow path The removal of the corrugated folds adds a significant reduction in vorticity to calculate