Magnaflow Catback Installation Guide (99-04 GT/Mach 1)

The below installation instructions work for the following product:

Magnaflow Catback (99-04 GT/Mach 1)

Here at American Muscle, we're all about DIY (do it yourself). Of course, there's nothing wrong with seeking out a little bit of tech help prior to taking on an installation on your own. Our Mustang installation guides will provide valuable instructions and hopefully answer any how-to questions that you may have along the way.

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Please read through the instructions carefully before starting this project.  Take the time to get all the materials together as well as all the safety equipment.

When working on, under or around any vehicle, exercise caution. Please allow the vehicle's exhaust system to cool before removal, as exhaust system temperatures may cause severe burns. If working without a lift, always consult vehicle manual for correct lifting specifications. Always wear safety glasses and ensure safe work area. Serious injury or death could occur if safety measures are not followed.

Installation:

1. To begin removal of your OEM exhaust system, you will need to cut the tail-pipes just behind the mufflers. Remove the tail pipes from the OEM rubber insulators. Do not damage the OEM rubber insulators, as they will be reused with your new system. Next, unbolt the extension pipes from the H-pipe and remove the mufflers from their OEM rubber insulators. Do not discard the fasteners required to bolt the extension pipes to the mufflers, as they will be re-used.





2. Begin installation by bolting the new front extension pipes to the H-pipe with the supplied flanges and the OEM fasteners. Leave all clamps and fasteners loose for final adjustment of the complete system. Working rearwards slip the new mufflers over the ends of the extension pipes and mount the muffler hangers into the OEM rubber insulators. Slide the tips onto the tail pipes, and fit the tip hangers into the OEM rubber insulators under the rear fascia. Adjust the tips for aesthetics before tightening the mounting points.







3. With all components mounted loosely, adjust the system for overall aesthetics and clearance of frame & bodywork. (MANGAFLOW recommends at least 1/2" of clearance between the exhaust tips and the rear fascia to avoid heat related body damage or fire.)
   
   
4. Once a final position has been chosen for the new system, evenly tighten all fasteners from front to rear. The supplied band clamps must be VERY tight to properly align the pipes and prevent leaks (Approximately 65 ft-lbs). U-bolt clamps should be tightened to approximately 30-35 ft-lbs. inspect all fasteners after 25-50 miles of operation, and retighten if necessary.