Apex-i Blow-Off Valves

"Rather than relying on the vacuum chamber alone, the Twin Chamber Blow Off Valve harnesses boost pressure in a second chamber to assist in opening the relief valve. This design allows the use of a unique flat-valve design, which provides excellent valve response under both low and high boost conditions without sacrificing flow capacity." -Coz Both valve reaction time and blow-off sound can be quickly tuned on the car, but no matter how they're adjusted they never fail to turn heads. When mounted, you can just see them peeking out of the lower air scoop.