TSP 1 7 8" Long Tube Headers With Catted Y Pipe for 2014+ Chevy GMC 6.2L Trucks, 304 Stainless Steel New York, NY, USA. 15 May, 2010. ***EXCLUSIVE*** Courtney Yates at the. Texas Speed & Performance is proud to introduce our 1 7 8" long tube headers and y pipe package to our exhaust line up for the 2014+ Chevrolet and GMC 6. 2L vehicles. These headers are built of quality 304 stainless steel with full mandrel bends for long term durability and maximum flow. Our full long tube design allows for excellent horsepower and torque gains throughout the RPM band! It is a must for those looking to wake up their direct injection GM truck, whether it be for more pulling power or reduced 1 4 mile ET's. ***DRIVER SIDE HEADER PRIMARY MAY REQUIRE MODIFICATIONS FOR TRUCKS WITH STEERING SHAFT COUPLER*** ***Y PIPE MAY REQUIRE MODIFICATION FOR 4X4 APPLICATIONS***