Forge Blow Off Valve (DSM)
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Comes in 2 Versions, Select Blow-Off Valve for atmospheric operation or Diverter Valve for venting make into the intake pipe.
Blow-off Valve Made from billet aluminum, this atmospheric valve dumps the charge-air to atmosphere creating the "Whoosh" sound most commonly associated with rally cars.
Diverter Valve Made from billet aluminum, this recirculating diverter valve dumps the charge-air back into the air intake system keeping external noise to a minimum.