GrimmSpeed POST MAF HOSE KIT black for 2015-2021 Subaru WRX (125023.1) 31015 Magnum Flow Pro 5R Oval

Magnum Flow Pro 5R Oval Tapered Blue Air Filter (24-91064) by aFe

Typically Installs within 12 hours For Most Techs*

Cartridge 1998 Suzuki DR350SE Cartridge

MR2 1999-2007

28% larger throttle body upgrade

GrimmSpeed POST MAF HOSE KIT black for 2015-2021 Subaru WRX (125023.1) 31015 Magnum Flow Pro 5R OvalOur post MAF hose construction improves on OE with 2 main features: First is the smooth inner surface, removing the pockets from the OE structural corrugated folds. The GrimmSpeed Post MAF Hoses are comprised of 4 ply silicone and unlike our competitor's offerings, are reinforced with an internal stainless steel wire running the length of each piece. This makes our hoses sufficiently flexible and also allows them to retain strong structural properties