More Horsepower and Torque. Improve the performance of your 2011-2023 5.0L Coyote Engine with a set of BBK Long Tube Headers. These BBK Long Tube Headers will greatly improve your Mustangs exhaust flow over the restrictive factory manifolds and increase your Pony's rear wheel horsepower and torque. Significant increases of up to 30 rear wheel horsepower have been seen when installed with a matching BBK Shorty X pipe or Midpipe Adapter. Silver Ceramic Coating. These Long Tube Headers are completed in BBK's Polished Silver Ceramic Coating that not only looks great, but reduce under hood temperatures to help increase horsepower and extend the life of the headers. Ceramic Coated headers will long out last both chrome plated and polished headers.Quality Construction. BBK Long Tube Exhaust headers are manufactured from 1-3/4 inch CNC mandrel bent tubing for unrestricted airflow. These Headers feature one piece laser cut 3/8 inch header flanges for additional strength, leak-free performance and a OEM fit. The headers are then finished with BBK's high-temp Silver Polished Ceramic Coating for good looks and to lower under hood temperatures. Tuning Required. Installation of these BBK Long Tube Headers will require the use of a tuner to reprogram the vehicle’s computer or ECU for operation. By reprogramming your Mustang’s ECU, you can maximize the full potential that these Long Tube Headers have to offer.Additional Required Upgrades. BBK Long Tube Headers require the use of a BBK Shorty Midpipe, part# 1655 or 1658, for S197 (2011-2014) GT or the BBK Long Tube Header Adapter Mid-Pipes part# 1816 or 18160, for the S550 (2015+) GT for proper installation.Not CARB Certified. These BBK Long Tube Headers are not CARB certified, therefore they are not legal for use in California or other states adopting California emission standards. Not legal for use on pollution controlled motor vehicles; not intended for highway use.Application. These BBK 1-3/4 Inch Long Tube Headers; Ceramic are specifically designed to fit the 2011-2023 GT Mustang models equipped with the Coyote 4 valve 5.0L V8 engine.