MagnaFlow Catback Exhaust Kit Stainless Steel With 3.5" Tips Cobra 1999-2004

Many times, you can hear a Mustang coming down the road long before you can even see it. For many owners, getting that Mustang sound just right is their number one priority.

Our one Bullitt sounds pretty good with the welded in flow masters and old school age pipe, but today, we're going to take it to the next level with an off road X and a full stainless steel exhaust system from MagnaFlow.

We're going to be installing MagnaFlow's two-and-a-half inch off road X-pipe. It's going to fit all '99 through 2004 GTs, Mach 1s, as well as the Bullitts. It's two-and-a-half inch mandrel bent, making it a direct swap using stock manifolds or shorty headers.

We'll be matching our X-pipe up with this two-and-a-half inch stainless steel Cat- Back also from MagnaFlow. It's going to fit your '99 through 2004 GT, Mach 1 or Bullitt. Features mandrel bent construction, full stainless steel, including the tail pipes, the flow tubes, the polished mufflers, along with the tips with the MagnaFlow engraving right on the edge.

For this installation you'll need a jack and jack stands or a lift, 3/8 impact gun, 3/8 ratchet, 12" extension, a swivel, 9/16 shallow socket, 9/16 deep socket, 15 mm deep socket, 02 sensor tool or 7/8" wrench, hammer, exhaust donut removal tool, Sawzall, and safety glasses.

Once you get your Mustang off the ground, the first step's going to be remove the factory exhaust system and then the factory H-pipe. If you're still running a factory system or a welded in muffler like we are, you have to cut the tailpipes off to remove them.

We're going to disconnect our flow tubes from our H-pipe. Now, we'll separate the H-pipe from the Cat-Back. Once you remove the H-pipe, we're going to remove our stock Cat-Back. To do that, you're actually going to have to cut the tailpipe right behind the muffler before it goes over the rear axle. Now, we're going to remove the tailpipe from the hanger. Now, we'll slide it off a tailpipe hanger, and remove our factory tailpipe.

Now, we're going to disconnect the front and the rear oxygen sensors. Next, we're going to remove the two nuts from the manifold stubs on both sides. Now, we're going to pull off our old H-pipe. Before we can install our new X-pipe, we're going to remove the oxygen sensors off the old H-pipe and move them over.

We're going to use just a dab of Anti-Seize and install the oxygen sensor and our new X-pipe. Now repeat the process with the other three sensors. There's a gasket between the X-pipe and the manifold only on the passenger side. You can reuse it if it looks decent. In our case, it has a little bit of wear on it, so we're going to replace it.

Now, we're ready to put the X-pipe up into place. It's not a bad idea to grab some help here to hold the back of the pipe while you align it in the front. Now we'll reinstall the retaining nuts. Now we're going to tighten them down starting with the passenger side, because it has the gasket on it.

Now, we can move on to our Cat-Back. We'll start with the intermediate pipes. We're going to grab the longer one for the passenger side. The shorter one is going to be for the driver's side so they're both about the same length when they're installed. Just mocking everything up at this point so you want it get it hand tight. We're not going to tighten it up until the whole system is installed.

Now, we're going to install the mufflers with the supplied clamps. When installing the muffler, they are side specific. Make sure the inlet is towards the center of the car, and the hanger's also pointing towards the center. Then move on to the tailpipes.

Now, we'll install the tailpipes. Again, they are side specific. You want the hanger facing towards the outside of the car. Now, we're ready to install the exhaust tips. The exhaust tips come with this Allen key, these Allen nuts, and this adjustable rod that go onto the factory hanger. I'm going to install the rod the long way through. Leave the bolt loose when you put it on the car, and we'll adjust it on the car. We want make sure the screw is on the inside of the car. That way, we can adjust it once the tip is in place. Again, just get it loose for now.

Now, we'll move on to the passenger side. We want to start making sure everything is clear and it's properly lined up, and we'll start tightening them down. Now tighten the Allen key. Last step before we start it up, is to reconnect our 02 sensors. Now the installation's finished.

Keep in mind, an off road X-pipe, such as this one here, is for off road use only. You will also get a Check Engine light. You'll need MIL eliminators as we're using here, or a custom tune to turn off the light. Now, we can fire it up and check everything. Manifolds have a nice deep tone at idle. That has a nice aggressive sound without being too overkill. Definitely a huge improvement over the old system.

Our MagnaFlow Exhaust looks and sounds great, and the stainless steel construction means it'll stay that way for years to come. Installation will be around four hours. You'll be back on the road in no time.