Fitment is precise: this Maxton Design Street PRO rear diffuser bolts straight onto UK-spec Subaru Impreza WRX STI Mk3 Facelift models (2011-2014) - no trimming, no guesswork.
It’s made from 10mm thick ABS plastic: impact resistant, UV stabilised and weatherproof for real UK roads. TÜV MATERIALGUTACHTEN certified, not just lab-tested on paper.
Includes full mounting kit and protective film - ready to install
Paintable with proper primer; holds gloss or matte finishes well
Aggressive street-pro styling without compromising ground clearance
