Test vehicle: 1997 F-250 heavy-duty crew-cab pickup, 4-wheel drive, 4.10 gear ratio.Solo vehicle weight: 6,850 lbs. Towing combined vehicle weight: 17,480 lbs.Horsepower and torque measured at rear wheels.1995 Power Stroke variations:Ford trucks for model year 1995 fall into two categories: early 1995 and late 1995.It is important to know the specific model: Early 1995 model year - little or no straight section at muffler outlet, where it connects to tailpipe. Late 1995 model year - appx. 3 inch straight section at muffler outlet, where it connects to tailpipe.Optimizes airflow, air density, continuous power & MPGImpressive gain up to +120 hp/+256 lb-ft (rear wheel)The Ultimate Power System for Towing & WorkHonors the host vehicle & improves longevity10% improved mileageEmissions Compliant: D-161-124, D-161-82