aFe Power 49-44072-P 3" Cat-Back Exhaust System (Stainless Steel) In recent testing, produced +14 horsepower and +17 lbs. x ft. of torque on our in house dyno. (tested on 2014 Chevrolet Silverado V8-5.3L) Constructed of 3" mandrel bent stainless steel tubing Single side exit system Includes a 4-1/2" dia. high luster, polished, stainless steel tip Fits: Regular Cab/Short Bed (119" Wheelbase/6.6 Ft. bed), Regular Cab/Long Bed (133"Wheelbase/8 Ft. bed)