For the MK3 RS owner who’s done stage 1, eyeing fast road or track day duty, and wants wider rubber without trimming the factory arch liners - these Airtec extended arches are a known fit.
Chassis-specific: designed for MK3 RS (2015-2018), not generic Focus ST or MK2/MK4
Extends front arches by 45mm, rear by 35mm - enough for 275/35/19 on 9.5" ET22, no rubbing on stock suspension at normal ride height
GRP construction, white gelcoat finish - ready for block, primer and colour match; no pre-paint prep required beyond light keying
Fits with OEM arch liners, stock bumper mounts and standard RS wheel arch trims - no cutting, drilling or liner modification needed
Search terms this actually matches: mk3 rs extended arches, airtec focus rs arches, focus rs fast road bodywork, mk3 rs track day arches, focus rs show car arches, mk3 rs decat setup (yes, they clear big exhausts too)
