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How to Install Magnaflow Competition Cat-Back Exhaust on your Mustang

Installation Time

2 hours

American Muscle
Shop Parts in this Guide

Warning: 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 a safe work area. Serious injury or death could occur if safety measures are not followed.

Step 1: (Carefully read all instructions before installation) 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 re-used 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.

Step 2: Remove the existing muffler mount brackets, and replace them with the new brackets supplied in the kit. Do not discard the OEM mount fasteners, as they will be re-used. Starting at the H-pipe, begin installing your new exhaust system by bolting the muffler assembly inlet pipes with the OEM fasteners. Leave all components loose until a final position has been set. Working rearward, install the Tailpipes using the supplied 3.00" clamps. Then install the optional polished tips of your choosing using the supplied clamps hangers and set-screws.

Step 3: With all components mounted loosely, adjust the system for overall aesthetics and clearance of frame & bodywork. (MAGNAFLOW recommends at least 1/2" of clearance between the exhaust system and any body panels to prevent heat-related body damage or fire.)

Step 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 40ft-lbs). U-bolt clamps should be tightened to approximately 30-35ft-lbs. Inspect all fasteners after 25-50 miles of operation and retighten if necessary.

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