Designed to release excess compressor pressure caused by changing gears orbacking off the throttle quickly, while allowing for maximum flow by venting allpressure back into the intake system. For the serious enthusiast not wanting toworry about noise, fuel deviations, and engine stalls of vent-to-atmosphere BOVs.The Tomei BOV allows for quick boost response and greatly increases the life ofthe turbocharger. When properly installed and adjusted, there is no limit to themaximum boost pressure these units can hold!

TECH TIP: This is a bolt on blow off valve, no welding required.

Fits: Lancer Evolution VIII, IX

Part # to-191186