FORD MUSTANG 289 302 WINDSOR HOOKER COMPETITION HEADERS. LHD # 6901HKRFORD MUSTANG 289 302 WINDSOR HOOKER COMPETITION HEADERS. LHD # 6901HKR Header Style: Full length Header Material: Steel Header Finish: Temporary non high temperature paint Weld Up: No Primary Tube Outside Diameter (in): 1 5 8 in. Flange Style: Standard Collector Attachment: 3 bolt flange Collector Diameter: 3. 000 in. Collector Reducers Included: No Tuned: No Primary Tube Gauge: 16 gauge Flange Thickness (in): 5 16 in. Bolts Studs Included: Yes