The fresh air valve allows for incoming charged fresh air from the turbo to be diverted safely into the exhaust manifold pre-turbine wheel with the throttle at low opening angles to allow for safer spooling of the turbocharger without the potentially damaging throttle based late combustion event style anti-lag that can induce high engine stresses and break connecting rods

Inlet Hose Adapter 1-1/2' OD

Xtreme Performance upgrade kits are available with everything you need for a successful installation + accessories you may want to upgrade or replace while the gearbox is out of the vehicle

and a Gasket

Clutch Kit - Xtreme Performance Rigid Ceramic Single Plate Incl Flywheel KGM28591-1E Feal suspension The fresh air valve allows