Air Filters

£ 44.95
AS Performance Group 'A' Air-filter Air-Ram feed + RS slam panel option

The group 'A' open air-filter kit has been a great addition to the ST225, problem was lack of cold air, AutoSpecialists has come up with the solution, factory looking Air-ram system that gives you just as much cold air as a Focus RS!

Please note, this currently only fits AutoSpecialists Group 'a' air-filter.

£ 159.00
AS Performance Group 'A' open Air-filter with Cold Feed Scoop
  • Kit includes - £159
  • 1x Huge Group 'A' style k&n filter
  • 1x AS performance 80mm trumpet with cold feed scoop 'powder coated satin black'
  • 1 x Pair of custom made silicon Pro-hose joiners 'stainless clamps included'
  • RS Ecu cover is required to fit this filter kit, available for £79.95
  • Add AS Alloy top induction pipe for only £125
£ 129.95
AS ST Alloy top induction pipe - Satin Silver Polished or Pro-Series Black

Available in Satin Silver (Motorsport Style Finish), Polished alloy or Pro-Series Black

Fits all Focus ST 2005 to 2011

£ 269.99
K&N 57I Cold Air Induction Kit Focus ST225
  • Cold Air Induction K&N 

    Feeds 100% 
  • Free flowing pipe trunk up to the air flow meter.
  • up to 14 bhp + increase
  • Easy D.I.Y fit
  •