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GFB Stealth FX Dual Port vents to the intake & vents to the atmosphere with its dual port action. This blow off valve is ideal if you want the loud swoosh without your car stalling out. By utilizing a unique air diverting system, you can control exactly how much air you dump to the atmosphere for noise, or the inlet for silence. By sending the vented air back to the inlet (rather than muffling it), there is no restriction and the valve still operates at maximum efficiency.For cars with sensitive air flow meters such as the EVO, the valve can be tuned to vent just enough air back to the inlet to prevent backfiring while still giving the loudest possible blow-off 9
Tech Tip: This is a 100% bolt on BOV for your 03+ EVO, no expensive flanges are required for installation.
$319.95
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