BBK Chrome Long Tube Headers Ford Mustang (11-13 V6) 1642 PRODUCT FEATURES Increases RWHP Long Tube header design Free flowing Mandrel-bent tubing Bright Chrome finish O2 extensions included Fits 2011-2013 3.7L V6 Mustangs More Horsepower and Torque. Improve the performance of your 3.7L Ti-VCT engine with a set of BBK Long Tube Headers. These BBK chrome plated long tube headers will greatly improve your mustangs exhaust flow over the restrictive stock factory manifolds and increase your Pony's horsepower and torque. Significant increases in rear wheel horsepower have been seen when installed with a matching BBK shorty X pipe. Quality Construction. BBK Long Tube Exhaust headers are manufactured from 1-3/4" CNC mandrel bent tubing for unrestricted airflow. And feature one piece laser cut 3/8" header flanges for added strength, leak-free performance and OEM fit. These headers are then completed in a bright chrome finish for good looks and a long life. Recommended Upgrade. To realize the full power potential that these Long Tube Headers have to offer, AmericanMuscle recommends a custom tune with either a SCT SF3 or SCT LiveWire Custom Tuner. Application. These Chrome Long Tube Headers are designed to fit the 2011-2013 and newer 3.7L V6 Mustangs. BBK long tube headers require a flanged end shorty midpipe in order to function properly. BBK recommends using a BBK shorty X-Pipe for the best performance gains (see drop down option above). O2 Sensor Extensions Included. These BBK Long Tube Headers now include the correct length O2 sensor extension required for proper installation. Technical notes. Not legal for use on pollution controlled motor vehicles; intended for off road use only.