The MagnaFlow Street Series cat-back system, part 15638, replaces your ride's stock exhaust components from near the catalytic converter on back. Its tailpipe ends are stainless steel with 3.5-inch tips, and the manufacturer describes the stainless build as corrosion-resistant, so it holds up better than a mild-steel replacement in salty or humid climates. For buyers searching for a 1994-1998 Mustang GT cat-back exhaust, a stainless bolt-on kit that replaces the factory tail section is a practical upgrade.
Why pay more than stock or a budget kit? The manufacturer states this system is dyno-proven, and it was developed with extensive 3D scanning to produce a direct-fit design. That scanning matters in real life because it cuts down on the trial fitting and bracket modifications that cheaper universal-style pipes often force on DIY installers. Owners looking for a quieter, cleaner fit than an aftermarket kit that needs modification will find the value in this bolt-on design.
Fitment needs careful checking before you order. The manufacturer lists 1994-1995 Ford Mustang 5.0L | 1996-1998 Ford Mustang 4.6L, so a 1994-95 GT with a 4.6L or any Cobra application should be confirmed with the manufacturer first. For the install, the manufacturer notes that basic automotive knowledge is needed and that professional installation is always recommended. Magnaflow's published guide for 94-98 GT and Cobra models calls for disconnecting the battery before removing the factory system, which also lets the engine computer reset itself.
The manufacturer lists the 1994-1995 application on the 5.0L engine and the 1996-1998 application on the 4.6L. Confirm your specific engine and model year with the manufacturer before ordering.
The manufacturer's spec sheet lists the mounting bracket and gasket or seal as not included. The manufacturer also states the kit includes the hardware needed for a do-it-yourself installation, so check the packed contents against the install guide before you start.
The manufacturer says the install requires basic automotive knowledge and recommends professional installation. Owners who are comfortable with lifting the car and cutting factory exhaust pipe can do it at home.
Per Magnaflow's published guide for 94-98 GT and Cobra models, disconnect the battery before removing the OEM exhaust, then cut the tailpipes just behind the mufflers. Keep the factory rubber insulators and mounting fasteners, since the guide says they are reused with the new system. Bolt the front extension pipes to the H-pipe first, leave the clamps loose until the whole system is hung, then tighten from front to rear once the tip position is set. Cutting tools and a way to lift the car are the main requirements, so plan for a few hours of work.
