Towing combined vehicle weight - 13,000 lbs. Horsepower and torque measured at rear wheels. Truck is air injected is 2-bolt flange with 1 inch steel tube is present at back of exhaust manifold on passenger side. 1987 trucks - Banks only fits models with electronic fuel injection (EFI). Stinger Bundle, Power System with Single Exit Exhaust, Black Tip for use with 1993-1997 Ford 460 Extended or Crew Cab, Automatic Transmission Optimizes airflow, air density, continuous power & MPG Honors the host vehicle & improves longevity Major performance at a modest cost Rear-wheel gains up to +40 hp and +50 lb-ft 10% better fuel economy BLACK tip Emissions Compliant: E.O. Not Required