09D HVF Performance Air Filter [Focus RS/ST Mk3]

ZERONINE DESIGN performance air filter for the Mk3 Focus RS/ST is a high-quality replacement option for owners that demand the maximum performance increase, perfect fitment and an enhanced induction noise, whilst retaining their original OE air intake system. By using a lightly-oiled synthetic cotton gauze material that we call Hyperflow™, ZERONINE DESIGN air filters provide the ultimate in both airflow and filtration properties plus, thanks to a multi-stage manufacturing process, our filters also result in virtually no seepage of the frame material into the filter media. That also translates to a larger comparable filter area and more surface airflow than the equivalent sized filters from some other well-known brands. Compatible Models: Mk2 Focus RS/RS500 Mk3 Focus ST Mk3 Focus RS