The new Kompact Shortie for the Ford Focus RS have been machined in-house, from solid billet aluminium. Keeping the process in-house, ensures only the best quality, and none of the cracking or leaking that plague the factory plastic valves. Like their predecessors, they’ve been engineered with a light-weight, brass/aluminium, two-piece piston. Carefully engineered springs make these the most responsive valves of their kind. Shorties are supplied with both a swivel “banjo” nipple and a straight nipple. All billet construction, and well-designed internals mean it will hold as much boost as you want to throw at it, for as long as you need it to. The Plumb Back version is as quiet as a factory valve, or if you’re looking to make a little noise, the Dual Port version’s superior flow characteristics will safely provide that BOV sound you’re looking for. The new twin fixed ports flow more than ever before.