Pacesetter Performance Y Pipes improve exhaust flow, resulting in increased horsepower and torque, eliminating a bottleneck in the exhaust system. Made in the USA! This item is used in conjunction with the Pacesetter Long Tube Headers (part 70-2268 72C2268 70-2269 or 72C2269). If you are not using Pacesetter Long Tube Headers, this part will not fit. The part number for this item is 82-1178 and it fits 2014-2016 Chevy Silverado / Sierra 1500 Series 5.3 and 6.2 V8 models already equipped with Pacesetter 70-2268 72C2268 70-2269 or 72C2269 LONG TUBE Headers.