This Airaid SynthaFlow air filter is designed to be a direct fit replacement for the 1999-2004 GT Mustangs with Airaid Cold Air Intake part# 450-204 installed.
Regain the lost performance and fuel economy of your Mustang simply by replacing that dirty old air filter element with a new replacement Airaid SynthaFlow air filter to see an improvement in power and fuel efficiency, all while still providing excellent filtration.
This Airaid premium air filter provides far superior air filtration than the stock filter, since it is made with SynthaFlow® technology. SynthaFlow® is a synthetic nano-fiber material that traps the smallest dirt particles that ordinary cotton-gauze "performance" filters just can't capture. Airaid Premium Filters, with SynthaFlow® can capture particulates down to 2 microns in size. And best of all Premium Filters are washable and re-usable saving you money.