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Magnaflow Dual Exhaust Catback System Installation Guide ('99-'04 V6)

Installation Time

2 hours

Tools Required
  • Oetiker Style Clamp Tool
  • Side Cutter Pliers
  • 1/4" Ratchet and Extension
  • 1/4" 5.5mm Socket
  • Small Screw Driver
  • Inch/Lb Torque Wrench
American Muscle
Shop Parts in this Guide


1. Disconnect the vehicle's battery before removal of the OEM exhaust. This will allow the computer to reset itself with the new system and prevent electrical accidents. To aid in removal of your OEM exhaust system, you will need to cut the tail pipe from the mufflers. After removing the tail pipe, unbolt the extension at the front of the muffler from the catalytic converter extension. Do not discard or damage the OEM fasteners or damage the OEM insulators as they will be reused to mount the new system. Remove the muffler from the OEM rubber insulators.

2. Install the passenger side mount bracket with the panel nuts and flange bolts supplied in the kit, similar to the OEM driver's side mount. Leave all clamps and fasteners loose for final adjustment of the complete system. Next, install the rear rubber hangers using the supplied panel nuts and flange bolts. (The frame of your car has pre-cut slots in the frame for installing panel nuts).

3. Install the muffler assembly by fastening it to the catalytic converter using the OEM fasteners. Leave all clamps and fasteners loose for final adjustment of the complete system. Install the tailpipes using the supplied 2.50" clamps and by fitting the welded hangers into the rubber insulators. Install the tips using the supplied clamps hangers, and 8mm set-screws to lock the tips of the hangers. (MAGNAFLOW 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 hardware after 25-50 miles of operation, and re-tighten if necessary.

Installation instructions provided by Magnaflow

This guide applies to Vehicle years: 1999, 2000, 2001, 2002, 2003, 2004 and Submodels: V6

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