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Gibson Exhaust Systems Part #65637 Customer Reviews

Average Rating

3 Customer Reviews

Alarm Clock

Reviewed by David W (Madison, WI) — Feb 02, 2015 4:46 PM

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0 of 1 people found the following review helpful.

This exhaust system woke the truck up. Sounds great and not annoying. Looking at putting Gibson exhaust on all my vehicles.

Gibson exhaust

Reviewed by Scott M (Springfield, IL) Reviewed for a 2010 GMC Sierra — Dec 13, 2014 4:26 PM

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Sounds good

Sounds like a truck now!

Reviewed by Todd B (Minneapolis, MN) Reviewed for a 2010 GMC Sierra — May 21, 2013 9:33 PM

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Quality product! I had the system installed by a muffler shop so cannot comment on installation portion. I was concerned if this would be loud enough. It has the deep bass and you always know when you are on the gas. My truck sounds like a hot rod if I am really on the gas. There is a deep tone at certain speeds when it goes down to 4 cylinders. It's not bad but I can tell now when this occurs. I believe I have a little more power in lower and mid-range. Haven't tested mpg yet.

Gibson Exhaust Systems - 65637

Cat-Back Dual Extreme Exhaust
  • $654.82
    • On Sale: 15% Off
  • $556.60
  • Free Shipping
  • Ships Between 7/30 - 8/01
  • What Do You Drive?


  • Style:
    2.25" Dual split swept side exit (Stainless)
  • Part #:
  • Exits behind rear tires
  • Tubing diameter: 2.25" aluminized mandrel bent tubing
  • Muffler specifications:
    • Inlet: 3.00" center
    • Outlet: 2.25" dual
    • Body height: 4.00"
    • Body width: 9.00"
    • Body length: 18.00"
    • Body shape: Oval
    • Exhaust sound: Aggressive
  • Tip specifications:
    • Inlet: 2.25"
    • Outlet: 3.50"
    • Length: 12.00"
    • Finish: Polished
    • Material: 304 Stainless steel
    • Shape: Round
    • Cut: Slash-cut
    • Attachment: Clamp-on
  • Download installation instructions (PDF)

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