Improves Flow For More Power.
Improve the horsepower and torque of your 4.6L GT Mustang by replacing those restrictive stock factory cats with a brand new Flowmaster H-Pipe that features high-flow catalytic converters. The Flowmaster high flow catted H-pipe will significantly improve your Mustang's exhaust flow for a notable increase in horsepower and torque.Muscle Car Rumble.
This free flowing Flowmaster mid-pipe will not only improve performance, but it will also add a deep muscle car rumble to the sound of your exhaust with its classic "H" crossover pipe design.Quality Construction.
Constructed in the USA from durable 2.25" 16 gauge 409 stainless steel tubing for it's corrosion resistant properties this Flowmaster H-Pipe features four high flow catalytic converters, two main cats and two pre-cats. The included catalytic converters feature a durable ceramic substrate material making them perfect for naturally aspirated applications.49 State Legal.
The included catalytic converters meet or exceed USEPA standards and are 49 state emissions legal. They are not
legal for use in the state of California.Application.
This Flowmaster High Performance Catted H-Pipe is designed to be a direct bolt-on replacement for the 1999-2004 4.6L V8 Mustangs, including the GT and Bullitt models with either aftermarket shorty headers or the stock factory manifolds installed.
Technical note: 2004 Mustangs require the use of 24" O2 sensor plug-in extender wires.
1999, 2000, 2001, 2002, 2003, 2004 Details >>