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Magnaflow GMC Sierra 3" Cat-Back Single Exit Exhaust System - Gasoline Engines

Magnaflow GMC Sierra 3
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Product Info:
$600.85 and up
$804.54 - $1,033.40
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Magnaflow offers all stainless steel construction exhaust systems for maximum durability under any environmental conditions. Add this top of the line exhaust to your GMC Sierra for maximum driving pleasure. Magnaflow exhaust systems can be installed in the comfort of your garage or driveway in about 45 minutes with a simple bolt on method. Features deep, basey tone when throttling, but quite during idle and highway speeds. This exhaust system is backed by a lifetime manufacturer warranty.

  • All stainless steel
  • Mandrel bent tubing
  • Cat-back system
  • Polished stainless steel tip
  • All exhaust hangers are pre-installed
  • Can be installed in driveway in about 45 minutes
  • Bolt on installation
  • Lifetime manufacturer warranty

Get that genuine Magnaflow sound that everyone craves with this 3" Cat-Back Single Exit Exhaust System. Magnaflow exhaust kits come with all exhaust hangers pre-installed and they mount to the OEM hanger locations for ease of installation. Upgrade your truck and provide an increase in performance with this high quality exhaust system.

The Magnaflow Wide Open Performance Difference:

All Stainless Steel:

The Magnaflow muffler is encased in an all stainless steel body as well as end caps and stainless steel perforated core. This steel reflects heat and resists corrosion better than cold-rolled steel. It also retains the finish longer, adding to Magnaflow`s long life and clean appearance.

High Temperature Acoustical Absorbing Material:

Packed between the steel mesh and the steel shell is a high temperature acoustical absorbing material. This dense wall of fiber filters out the harsh exhaust vibrations producing Magnaflow`s rich, powerful, performance tone.

Stainless Steel Protective Mesh:

The core is wrapped with stainless steel mesh that warms up quickly and maintains the muffler`s optimal temperature for exhaust movement. The mesh creates a porous barrier that allows sound vibrations to pass freely into the acoustical absorbing material inside yet prevents blowout and deterioration of the absorbing material.

All Welded Lap-Joint Construction:

The 1/2" overlapped metal-to-metal construction is used on all mufflers. This 1/2" overlap of steel occurs at every joint, creating a stronger surface-to-surface bond than mufflers employing only a rolled edge joint. The lap-joint is completed using a smooth, continuous MIG weld that seals the system and further strengthens the joint.

Straight-Through. No Restrictions:

Magnaflow’s one piece perforated stainless steel core lets exhaust gasses fly right through. Nothing gets in the way to slow them down. You won’t find any pressed-in louvers causing turbulence here. No louvers. No baffles. No sharp turns. Magnaflow’s straight-through design improves exhaust flow to increase torque and horsepower.


Magnaflow Accessories and Parts
2 reviews
Josh C
Calgary, AB
Great Exhaust
Great sound on my new exhaust and it adds seat of the pants horsepower for sure. It was easy to install - hardest part was removing the stock exhaust. I would definitely recommend this to anyone looking for a great look with even better sound.
patrick q
east hampton, CT
Magnaflow exhaust
This is an awesome product with great sound and it's very easy to install.
Manufacturer Part Number(s):
15562, 15564, 15573, 15602, 15617, 15618, 15728, 15732, 15778, 15779, 15780, 15782, 15789, 15818, 15838, 15839, 16567, 16740, 16742, 16789