Turbosmart Type 5 Plumb Back Recirculating Diverter Valve (Black) - Subaru Impreza WRX STi GC/GD categories-Brakes by removing the stock air

by removing the stock air box jumped up to 430bhp from 393

Provides Lowering Between 30-50mm

drive cautiously for the first 300-400 miles during which time dust will reduce and the pads will feel better and better

-significantly more torque

which reduces air flow and therefore performance

Turbosmart Type 5 Plumb Back Recirculating Diverter Valve (Black) - Subaru Impreza WRX STi GC/GD categories-Brakes by removing the stock airThe Turbosmart Type 5 Plumb Back Diverter Valve is made from durable billet aluminium designed to offer superior flow and performance. A fully recirculating valve that offers a quiet alternative to atmospheric valves. The Turbosmart Plumb Back Diverter Valve system vents all excess pressure back into the intake system and is ideal for cars with sensitive airflow systems and off road applications as the fully sealed design of the Plumb Back valve