These uncoated, standard-duty Hedders use TORK-STEP stepped tube technology to provide performance superior to any standard tube Hedder design. Originally designed for racing applications, Hedman is the first manufacturer to mass produce this technology for the street. All Hedman street Hedders are MADE IN THE USA, and are backed by a lifetime warranty against manufacturing defects! HTC coated stainless models also available. Hedman Hedders Tork-Step Stepped Hedders Exhaust Hedder 88690 Tube Size 1 5/8 in. - Ball CollectorImproves Combustion EfficiencyAdds Torque Throughout Entire Torque RangeIncreases Horsepower OutputQuicker Acceleration TimesImproved Fuel EfficiencyState Of The Art Hedder DesignRace Exhaust Technology For The StreetPit Stop USAoffers Hedman Hedders Tork-Step Stepped Hedders Exhaust Hedder 88690 at low everyday prices. Be sure to check out all of the products from Hedman Hedders including Hedman Exhaust System Parts and Accessories, Hedman Hedder, Hedman Hedders, Hedman Full Length Hedders, Hedman SB Ford Hedders.