OptiTorque Patriot Series Cylinder Head Stud Kit - 12 Point Nuts - Chromoly - Mazda 4-Cylinder RFD.3R3431.A If you prefer these headers

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Ford Mustang 2003-04

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OptiTorque Patriot Series Cylinder Head Stud Kit - 12 Point Nuts - Chromoly - Mazda 4-Cylinder RFD.3R3431.A If you prefer these headersProduct Description: Cylinder Head Stud Kit Patriot Series 12 Point Nuts Chromoly Black Oxide Mazda 4 Cylinder OptiTorque produces premium quality fasteners for a wide range of automotive applications. From stock rebuilds to hard core racing builds, OptiTorque fasteners are USA made and designed, featuring premium materials and designed to meet or exceed OEM specs.