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Magnaflow Exhaust Systems - 15318

Cat Back Exhaust - MF Series
  • $856.56
  • Free Shipping
  • Ships By 12/10
  • What Do You Drive?


  • Style:
    4" Single passenger side rear exit
  • Part #:
  • Color/Finish: Stainless
  • Exhaust Inlet Connection Type: Clamp-On
  • Sound level: Moderate
  • Exit Location: Single Passenger Side Rear
  • Tip Diameter: 5 in.
  • Sample Sound Clip
  • Download installation instructions (PDF)

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Magnaflow Exhaust Systems Part #15318 Customer Reviews

Average Rating

5 Customer Reviews


Reviewed by Hubert D W (Winchester, KY) Reviewed for a 2017 Chevy Silverado — Sep 08, 2017 4:34 AM

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It has a wonderful sound not too loud just perfect got the sound of power.

Magnaflow MF-15318

Reviewed by Timothy C (SODDY DAISY, TN) Reviewed for a 2017 GMC Sierra — May 30, 2017 8:25 AM

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I'm absolutely sure I purchased the right cat back exhaust for my 2017 GMC Sierra Denali. The 6.2l V8 creates a nice growl but is not overbearing. You know it's there when you put the accelerator down but subdued on the highway. The 5 inch tip is a nice touch and sets the visual tone to exhaust system. The system is "just right" with no drone and no issues when the truck converts to 4 cylinder operation. I recommend without hesitation.

2015 GMC Sierra Denali 6.2L Magnaflow Cat Back Exhaust

Reviewed by Rick T (East Peoria, IL) Reviewed for a 2016 GMC Sierra — Jul 04, 2015 10:56 PM

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Overall, very pleased with the Magnaflow exhaust. Two of the four hangers were off a bit and had to be adjusted, but I am a perfectionist. They probably would have been fine but now they are perfectly aligned. Exhaust has a very nice throaty sound when accelerating and quiet when cruising. Has a pretty good rumble when starting cold. Not too crazy about a five inch exhaust tip. Kind of makes it look like a diesel truck exhaust. The more I drive the truck with this exhaust, the better I like it.

2015 High Country

Reviewed by Mark E (TEMPE, AZ) Reviewed for a 2015 Chevy Silverado — May 09, 2015 11:21 AM

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Awesome addition, great sound, a little tough for one person, but only took a few hours to complete. Sticks out a little further than original, but still looks great.

Killer Exhaust

Reviewed by Clifton A (MORGAN CITY, LA) Reviewed for a 2015 Chevy Silverado — Mar 31, 2015 5:27 AM

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2 of 2 people found the following review helpful.

This system went on by myself in no time at all. All of the hardware was dead-on. The sound is great and with the resonator it still keeps the cab noise down. Overall performance was quite a lot you can feel the Lo-end torque. It is just a great system a bit pricey BUT! you get what you pay for and this set-up was well worth it. Thanx Magnaflow