AS started designing the induction kit as soon as they received there Focus ST, the kit was at first meant to be a simple open Air-filter which sounded good and was cost effective for customers (which it still is), as some of you will know we never seem do things by half's, so then an Alloy shield was made to mount the Air-flow meter, then we included parts to seal and direct cold Air into the K&N filter.

All finished! No, the 70mm K&N filter we were using kept falling off the Air-flow meter, so we designed a billet cnc mounting flange which now secures the huge 100mm K&N filter, to add to this comprehensive kit there is no drilling required and can be fitted in under 10 minutes (tools and Induction kit ready to install) All finished in our very popular Pro-Series Satin Black Guaranteed BHP gains over standard factory fitted Airbox, in 2 rolling road tests @ 2 different dyno's the AS Performance induction kit made BHP gains of 7-10bhp Improves power, amazing induction noise & transforms your engine bay all for £229 + £39.95 for silicon intake hose