METCO 2003-2004 Cobra - Air Filter Kit This Metco Motorsports high performance air filter kit is a direct bolt on and is a quick and easy way to add horsepower. The kit uses our CNC-machined, billet aluminum air filter-to-MAF adapter (PN MAF1001) to mate the stock (or aftermarket equivalent) 90mm Mass Air Meter to the included high quality, 10" x 4" S & B air filter. The kit also includes a precision-bent stainless steel air filter support bracket that is secured using an existing fastener in the engine compartment.