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  1. Performance Mufflers
  2. MagnaFlow
  3. 18 Inch Body Length
  4. 3 Inch Inlet Diameter
  5. 3 Inch Outlet Diameter
  6. 4 Round x 22 Long Inch
MagnaFlow Red Pack Glass Pack Straight-Through Muffler - Universal - Aluminized Steel - Satin Finish

MagnaFlow Red Pack Glass Pack Straight-Through Muffler - Universal - Aluminized Steel - Satin Finish

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3" Inlet/outlet; 4" diameter x 22" long. Achieve the classic glass pack sound without the burnout common to fiberglass-packed mufflers. Basalt rock wool surrounds a straight-through core, which enhances engine performance. Lowest Prices for the best performance mufflers from MagnaFlow. MagnaFlow Red Pack Glass Pack Straight-Through Muffler - Universal - Aluminized Steel - Satin Finish part number MF13129 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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MagnaFlow Performance Mufflers

  • 18 Inch Body Length
  • 3 Inch Inlet Diameter
  • 3 Inch Outlet Diameter
  • MagnaFlow
  • 4 Round x 22 Long Inch
  • Round
  • Aluminum Coated Steel

3" Inlet/outlet; 4" diameter x 22" long. Achieve the classic glass pack sound without the burnout common to fiberglass-packed mufflers. Basalt rock wool surrounds a straight-through core, which enhances engine performance.


Features:

  • Glass pack muffler produces lasting, vintage sound unlike that of any modern muffler on the market
    • Tightly packed basalt rock wool and aluminized steel mesh insulate the core to absorb high-frequency exhaust noise
    • Creates that classic glass pack rumble
  • Innovative basalt rock wool packing material outlasts fiberglass, which can burn out over time
    • Prevents sound degradation even with extended use
    • Protects from high exhaust temperatures and prevent blowouts
  • Straight-through design enhances exhaust flow, thereby increasing horsepower, torque and fuel efficiency and improving engine performance
    • Perforated core runs a direct route from inlet to outlet
    • Unique design excludes baffles, chambers and louvers, all of which impede airflow
  • Robotic CNC welding is unsurpassed for precise construction - prevents distortion and cracking
  • Aluminized steel with satin finish resists corrosion
  • Reversible muffler functions in both directions - can be flipped around for custom installation
  • Made in the USA


Specs:

  • Muffler shape: round
  • Overall dimensions: 4" diameter x 22" long
    • Body length: 18"
  • Inlet/outlet diameter: 3"
  • Inlet/outlet position: center/center
  • Core diameter: 4"
  • Welding required for installation
  • Lifetime warranty


This MagnaFlow muffler produces the classic rumble that's typical of a glass pack, but this glass pack muffler won't burn out over time. Traditional glass packs are insulated with fiberglass, which has a reputation for melting after extended use. When the fiberglass melts, the muffler loses its ability to cancel exhaust noise, and it functions more like a straight pipe.


This muffler, however, features a straight-through core that is insulated with basalt rock wool, which not only absorbs high-frequency exhaust noise the same way fiberglass does, but also stands up to high exhaust temperatures over time. Furthermore, the muffler body is precision machined using robotic CNC welding, which prevents distortion and cracking, thereby extending the life of your muffler. It's the ideal muffler for your hot rod or for any high-performance vehicle.

Internal muffler diagram of aluminized steel, perforated core surrounded by mesh and basalt rock wool acoustic fiber

A. This muffler's aluminized steel, perforated core runs directly from the inlet to the outlet, allowing exhaust gases to pass through without restriction. It contains no baffles, chambers or louvers, which would restrict airflow. When air flows unimpeded through the exhaust system, horsepower, torque and fuel efficiency increase. These increases lead to improved engine performance.

B. and C. To regulate exhaust noise, tightly packed layers of aluminized steel mesh (B) and basalt rock wool acoustic fiber (C) insulate the core. These materials absorb high-frequency sound waves to produce classic glass pack rumble, shield high exhaust temperatures and prevent hazardous blowouts.

D. Using robotic, CNC welding, the inlets and outlets are machined for precise, durable construction that eliminates distortion and cracking.

E. All components are made of aluminized steel with a satin finish, making this muffler corrosion resistant.



13129 Magna Flow Redpack Series Aluminized Steel Universal Glasspack Performance Muffler - Round Shape

Item # MF13129





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See what our Experts say about this MagnaFlow Performance Mufflers

  • Straight-Through Muffler for Louder Exhaust on a 1965 Ford Mustang
    Based on the description of your existing exhaust there would have to be some modification and additional exhaust pipe needed to replace your original muffler with # MF14149. This muffler is shorter at 12 inches long and the inlet/outlet are both centered. A muffler shop could make it work, no problem. If you are looking for loud then you might consider a glass pack muffler such as # MF13129. It actually uses basalt rock wool to avoid burnout that fiberglass packed mufflers can suffer from.
    view full answer...
  • Available Glass Pack Mufflers to Enhance Exhaust Note
    Without knowing your vehicle it is hard to give you a specific product recommendation, but the MagnaFlow Glass Pack Straight-Through mufflers we offer, such as parts # MF13124, # MF13129 and # MF13145, will produce a substantially louder exhaust note than a stock muffler. These and the other sizes we offer are all universal-fit weld-on products that help create a vintage sound unlike that of any modern muffler. They do this by eliminating baffles, chambers and louvers, all of which impede...
    view full answer...
  • Recommendation for 2002 Ford F-150 Lariat 5.4L to Sound Loud and Aggressive
    The MagnaFlow 4" Exhaust Tip - Stainless, Clamp-On for 2-3/4" - 3" Tailpipe # MF35212 will make your truck louder, but there are other options to make it much louder if that is what you are seeking. I recommend the MagnaFlow Red Pack Glass Pack Straight-Through Muffler - Universal - Aluminized Steel - Satin Finish # MF13129 as well. If you are looking for engine performance, I recommend the MagnaFlow Cat-Back Exhaust System - Stainless Steel - Gas # MF15749 if you have the SuperCab or...
    view full answer...

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Info for this part was:

Employee Brian B
Written by:
Brian B

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