1979-1993 Ford Mustang with Small Block Chevy 1 7/8" x 3 1/2" Swap Header 1 7/8" x 3 1/2" Mild Steel Long Tube Headers For use with stock 6 bolt pattern on 18* Small Block Chevy Head Must be used with AJE Motor Mounts, Moroso Short Style Filter #22459, Power Master Starter #9500, and AJE K-Member May work with other K-Members but may require modifications Due to the design of this product some applications may require the use of a Flaming River Steering Shaft Gaskets and all installation hardware included These products are NOT legal for sale, installation, or use on a licensed vehicle in the state of California, and they do NOT meet CARB compliance Specs: SKU 10651400 Year Range 1979-1993 Engine Type Chevy Small Block (262-400) Gauge 18 Tube Size 1.875 Weight 38 lbs