JBA MID-LENGTH HEADERS, STAINLESS STEEL, TITANIUM CERAMIC, SET OF 2 -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; 1.625 in. tube diameter, 0.375 in. standard head flange; Full-length style; Round head port; They include mandrel-bent stainless steel primary tubes, patented JBA Firecone collector, factory style emission connections, extra thick collector domes, CNC laser-cut flange, and oversized exhaust ports; Made of tough and durable stainless steel; Constructed through race-proven technology for maximum horsepower and torque gains; They improve throttle response, resist warping, prevent leakage, increase flow, and accommodate cylinder head porting; Fits most Z-bars; Vehicles may require Z-Bar modification or new JBA Z-Bar part number 1650Z for proper fit; Requires H-pipe part number 1650SH, 1650ST, 1650-1ST, 1652SH, and 1651SH; Easy installation.