Overview:Flowmaster introduces our new manifold downpipes for 1964-1966 Ford Mustangs with 289 c.i. engine. These 2.50-inch mandrel-bent 409S stainless steel downpipes include the 2-bolt flanges, donut gaskets and donut sleeves. Designed to mate up with Flowmaster exhaust system #17273 or #817273. Covered by our Lifetime Limited Warranty.Features:Serviceable Lifetime High-Flow 8 Layer Cotton Gauze FilterCross-Linked Polyethylene (XLPE) High-flow Intake TubeServiceable with our Delta Force Cleaning KitHigh Quality Components With Custom LookNo Cutting or Drilling For Easy InstallationIncludes Stainless Steel HardwareGains of up to 6% for HP and TQNo Special Tuning RequiredLifetime Limited WarrantyFlowmaster QualityEasy InstallationSpecs: 2WD/4WD: 2WD Brand: Flowmaster Clamping Type: Flat Band Clamps Included: No Color: Silver Emission Code: 3 Finish: Natural Flanged Inlet: Yes Flanged Outlet: No Gasket Or Seal Included: Yes Grade Type: Performance Hanger Included: No Heat Shield: No Inlet Diameter: 2 Main Piping Diameter: 2.5 Material: Stainless Steel Mounting Bracket Included: No Outlet Diameter: 2.5 Outlet Inside Diameter: 2.37 Outlet Outside Diameter: 2.5 Pipe Diameter: 2.5 Quantity: 1 Pair Shape: Downpipe Single Dual: Dual Tubing Diameter: 2.5 Part Number: 81076Applications:1964-1966 Ford Mustang 289 CIDEmissions: This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles. The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles: 1965 and older U.S. manufactured California Certified vehicles 1967 and older U.S. manufactured Federally Certified vehicles 1967 and older Foreign manufactured vehicle WARNING: It is against the law to install this part on an Emissions Controlled Vehicle! The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles 1968 and newer U.S. manufactured Federally Certified vehicles 1968 and newer Foreign manufactured vehicle