SuperMAXX Stainless Catted Intermediate Section is an excellent way to complete your Dynatech Header System on your 1999 – 2003 F150 2 & 4WD with a 5.4L engine. Designed with High-flow catalytic converters which flow 30% better than OEM, its easy to see why this system is all about increased power. 100% Stainless Steel construction with a Limited Lifetime Warranty makes the SuperMAXX header second to none. With a unique 2.50 Ball & Socket connection to the header and 2.50 tubes to connect to the factory or an aftermarket cat-back, this makes a great combination for stock engines and/or upgraded power plants. Fits with automatic or manual transmissions and takes about 4-6 hours to install. Comes complete with a detailed, full color instruction manual for easy installation. O2 Extension cables and all installation hardware are included. Designed for use with Dynatech Long Tube Headers (part number 722-84210).