The blow off valve is a pressure relief device on the intake tract to prevent the turbo's compressor from going into surge, which helps to prolong the life of turbocharger.

Features:
2.00" diameter housing.
1" brass piston with seal.
Large outlet for quick release and aggressive sound.
Advanced spring design allows for great response and performance at high boost.
Fits for Subaru WRX.
Professional installation is highly recommended.

Specifications:
Fitment: for Subaru Impreza WRX/STI 02-07
Color: Blue
Material: Aluminum Alloy
Item weight: approx. 389g / 13.7oz
Package size: approx. 12.5 * 11 * 8cm / 4.9 * 4.3 * 3.2in
Package weight: approx. 439g / 15.5oz

Package List:
1 * Blow Off Valve