Veteran's Day - 5% of Profits to Building Homes for Heroes
Buy now, pay later with Learn More

Need Help?

We've got you covered!

Sales & Service Hours

Sales & Service Hours

Customer Service

  • Monday to Friday: 8am - 6pm EST
  • Saturday/Sunday: Closed


  • Monday to Saturday: 8am - 12am EST
  • Sunday: 9am - 10pm EST

Magnaflow Glasspack Muffler 18129

Product Information
List Price:
Our Price:
Part #:
Inlet & Outlet Dimensions:
3" Inlet & Outlet
Body Style:
22" (Body Length - 18")
Single Muffler - 4" Diameter
  • Dyno Proven
  • Anti-corrosive aluminized body
  • Straight-through performance design


  • Non-Fiberglass acoustic material
  • Aluminized steel construction
  • Straight flow design
  • Robotically CNC welded
  • Creates classic American muscle sound
  • Ships same day if order is placed by 1:00 PM CST
  • Made in the USA – Oceanside, CA

Looking for that deep, throaty sound for your car or truck exhaust? Look no further! Magnaflow GlassPack Mufflers are the best muffler you can find to provide that smooth, rumbly tone.

These mufflers have a free-flowing design with a straight, perforated core. Magnaflow uses a non-fiberglass acoustic packing material that ensures your muffler will have a long life without any degradation of sound.

You can have a professional install one of these great mufflers or if you want to hone your skills, you can install your new muffler at home.

Make your car or truck the center of attention when you're out cruisin' by adding a GlassPack muffler today!

View Available Part Numbers For This Product Line

California Residents: Prop 65 Warning


Limited Lifetime Warranty

The manufacturer warrants that all Magnaflow Performance glasspack mufflers are free from defects. The warranty is void if the muffler is not installed properly on the vehicle for which it is designed.

This warranty does not apply to any muffler which has been installed on any commercial or racing vehicle or which has been improperly installed, altered, or subjected to misuse or damage from accidents. Also, cost of labor and any additional parts required to complete installation of a replacement muffler are not covered by this warranty.

The warranty certificate, along with proof of purchase, MUST be presented to the service outlet from which you originally purchased the muffler, or any participating dealer, when making a claim for replacement. The original muffler must also be returned and exchanged for a new muffler of the same part number.

No other warranty, expressed or implied (including merchantability), applies to the mufflers, nor is any person or the manufacturer authorized to assume any other warranty. The manufacturer does not assume any responsibility for any consequential damages occasioned by the muffler, or inconvenience or interruption in any operation.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.


MagnaFlow GlassPack mufflers can be installed at home with the right tools. Cutting and weld is required. For additional information please call us at 1-866-309-1907 or 701-253-5906.