Description: 100% Brand New,never been use Material: Stainless Steel Header Style:Full Length Primary Tube Diameter (in):1 5/8 in. Collector Attachment:3-Bolt Flange Collector Diameter:3.000 in. Cylinder Head Port Shape:Rectangular Primary Tube Gauge:16 Gauge 3/8" flanges and 3" collectors Flange Style:Standard Flange Thickness (in):5/16 in. Professional Installation is Highly Recommended (No Instruction Included). Package includes: Just as pictures shown Fitment: Ford Sb 289 302 351 Windsor Mustang 1964-1970 1964-1970 Ford Mustang with Small Block 260, 289, 302 and 351 engines(except 1966 Ford Mustang,1969 Ford Mustang) For Year and Model, Please Check Compatibility