HPS Performance 4" Air Filter, 10.75" Length, 6" Base, 4.5" Top HPS-4301 Engine Monitoring System Featuring a bold DM‑style design

Featuring a bold DM‑style design

Carbon Fiber Mirror Cap Replacements for the 2012+ Ford Focus

Acorn Design - Enclosed top prevents debris from accumulating in the lug hole and protects threads

Clear vs Smoke — which one is right for you

Plug-and-play fitment — Installs at factory sensor location with no adapter needed

HPS Performance 4" Air Filter, 10.75" Length, 6" Base, 4.5" Top HPS-4301 Engine Monitoring System Featuring a bold DM‑style designHPS Performance Air Filter with 4" inside diameter and 9" element length (Part # HPS 4301) is constructed from two layers woven cotton and dressed with synthetic oil, then finally encased in a steel mesh. The result is a filtration system that allows for plenty of fresh air to maximize performance and trap dirt and debris from damaging your cars engine. Proudly made in the USA, all HPS Performance Air filters are designed with performance in mind and