3MI Racing 3/4" Barbed End to 5/8" Barbed End Hose Adapter for AOS on Subaru EJ Engine Vehicle Model_WRX Open up the restrictions and

Open up the restrictions and let the mighty 4G63 breathe

Part #: NH108-1

Replace your factory BPV which is made of cheap rubber and plastic and known to rip and leak boost

If you have a 2003 WRX

3MI Racing 3/4" Barbed End to 5/8" Barbed End Hose Adapter for AOS on Subaru EJ Engine Vehicle Model_WRX Open up the restrictions andWHAT IS IT & WHEN DO I NEED IT? This 3MI product is a hose adapter from the 7 8" inch block outlet to the 5 8" inch vent hose that is required for the installation of the IAG Street, IAG Comp, Cobb and Crawford AOS systems using the 3MI Racing AOS to EJ drain hose. Simply the easiest way to converge the IAG, Cobb, & Crawford AOS' to the 3MI drain hose. The drain hose is available to purchase separately! 3MI Racing AOS to EJ Turbo Drain Hose Kit Subaru