Procats for allOrder a Procat for your car and get more power and performance. BTB's Procat has been developed for international race and rally competition, but can be used on any car. Seen here on a humble VW Golf GTi, the Procat perfectly complements a 200bhp chip upgrade to give an extra 8bhp while still complying with MOT emissions regulations. With police emissions spot checks now widespread, cat bypass pipes will no longer do. Order a Procat now for clean power!