Brand KAX Condition New Material 201 Stainless Steel Engine Size ?5.4l V8 Engines Fitment 1997-2003 Ford F-150 F-250 5.4l V8 1999-2004 F-250/F-350/F-450 Super Duty V10 Why Choose KAX Exhaust Header? Adding a set of high performance exhaust header. Let your engine breathe, let that engine growl, and give it power. Maximizing your engine output Dyno-tested to ensure maximum horsepower and torque gains. Allowing for the engine to more easily move exhaust allows for a lower operating temperature, which in turn allows for more air into the engine Designed to be an exact replacement for the factory exhaust header. Bolt-on design makes for an easy installation About KAX ® KAX, one of the star brands of SuncentAuto, was built in 2018 by experienced automotive experts. The dedicated team ensures that users receive advanced technology products and their overall driving experience is improved with their mindful innovations. Although the brand has been introduced a couple of years back, the team consists of experts who are into the automotive industry for more than two decades. Warranty: We accept authorized returns within 90 calendar days from the date the product was received by the buyer or original recipient unless otherwise specified at the time of purchase.