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25% Off Online Orders of Select Parts and Accessories. Enter Promo Code FOUND25 in Cart

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25% Off All Online Orders of Select Parts and Accessories
Receive 25% Off Your Online Purchase. Use promotional code FOUND25 at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 2/27/17. Online orders scheduled for in-store pick up must be completed by closing on 2/26/17 for discount to apply.

Free Shipping on Orders Over $50 or in-store pickup

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  • Part #: 18135|
  • SKU: 235082

Available tomorrow after 12 p.m.

    • Glass Pak mufflers are constructed of aluminized steel
    • All mufflers are engineered with a wide open performance design
PayPal available for online purchases. Major credit cards accepted online and in store. Pay online, in-store or take advantage of our Pep Boys credit card. Learn more and see additional details in cart.

MagnaFlow Performance Glass Pack Muffler

MagnaFlow Performance Exhaust has universal mufflers available for many applications in various sizes and configurations to fit your needs. Made of 100% stainless steel, these universal mufflers are a great addition since they not only improve your vehicle performance but also give it that show-stopping look.
  • Glass Pak mufflers are constructed of aluminized steel
  • All mufflers are engineered with a wide open performance design
  • Developed using our signature deep tone sound
  • Tested proven to increase horsepower and torque

Inlet Outlet Type
Single - Single
Outlet Position
Center - Center
Overall Length
Body Length


Rated 4.8 out of 5 by 4 reviewers.
Rated 5 out of 5 by Definitely makes some noise I put this on a 4.0 Jeep Wrangler. It wasn't a direct fit, but I was able to modify the stock system and weld it in place. The sound level and tone may not be right for everybody, but it works fine for me. Especially for the price I paid with a promo code. November 24, 2016
Rated 4 out of 5 by decent glasspack I have a 1998 4.6L f150. I removed tbe stock muffler to see what it sounded like. To my surprise it still wasnt obnoxiously loud but it sounded good. But after a couple of weeks I decided to buy a muffler. I was thinking flowmastef but I didnt want to spend that kind of money yet. So I bought this Magnaflow GlassPack. It is great quality and wasnt hard to install with a clamp. For a while my truck was actually quiet with a decent rumble. After a a few weeks it started to get louder and a lot nicer sounding. Still not as loud as straight piping it. I think I should have went with a shorter glasspack though November 5, 2015
Rated 5 out of 5 by Great product! These mufflers were purchased for my nephews first truck. I have been a Magnaflow guy since 1998. These mufflers are inexpensive, but still true to the Magnaflow name. They deliver an agressive growl out back and very little drone at cruise. Well worth the price! September 26, 2015
Rated 5 out of 5 by has a great sound I bought this for my 1991chevy pickup has a small block v8 gives it a nice deep rumble and is loud March 18, 2015
  • 2017-01-22 T14:20:10.170-06:00
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