Twin-chamber blow-off valve utilizes a revolutionary new dual chamber engineered for high and low boost response. On turbocharged vehicles, blow-off valves release excessive boost pressure trapped inside the intake pipe when the throttle is released. This prevents the pressure from backing up into the turbine compressor housing, causing it to rapidly stop and causing potentially destructive damage to the turbo. Twin-chamber blow-off valve uses two separate chambers with an assisting pressure hose. This design allows for a short and highly sensitive spring in the first chamber that controls a piston and a valve in the secondary chamber. Features: 1) 3-point sound adjustment 2) Spring tension adjusting screw 3) Piston sits inside top chamber for reduced wear 4) Valve sits bottom chamber releasing excess pressure 5) Encased in high finish aluminum housing
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