4 Best Glasspack Mufflers To Make Your Performance Car Sing (Loudly!)

If you own a performance-optimized vehicle, such as a car or a truck, you don’t need us to tell you just how amazing it is to drive. Comfortable, fast and raw, there’s nothing we don’t love about a turbocharged or enhanced project. However, while the car might drive well, what does it sound like?

When you’re driving around in a souped-up vehicle, not only do you want it to look good, but you want it to sound good as well. This means investing in a muffler to amplify your engine and exhaust sounds, but you can’t just go for any old muffler.

If you’re going for loud and proud, you’ll want to be focusing your attention on Glasspack Mufflers. This is famous for their straight-through design which simply makes your vehicle purr. This design works since most mufflers are angled, making the sound travel in different directions to make it quieter.

However, these mufflers allow the sound to travel straight through while being designed to make it so much louder than it would be conventionally.

What’s more, thanks to these awesome designs, these mufflers can even be proactive in allowing you to increase the horsepower in your engine, and lets your exhaust roar! In some cases, these mufflers can even make your vehicle deafening!

So, enough of the chit-chat, let’s get down to business. Below, you’ll find the results of our excessive search for the very best when it comes to glasspack mufflers.

We’ve even managed to whittle them down to just four to make even easier for you. Here are the four best glasspack mufflers that you need to be thinking about!
Flowtech 50225FLT Purple Hornies Slip-Fit Muffler

Flowtech 50225FLT Purple Hornies Slip-Fit Muffler

To start off this list, we’ve chosen the Flowtech Purple Hornies Muffler, an outstanding and incredibly affordable device that ticks all the boxes when it comes to a premium-quality product. In terms of sound, the Flowtech prides itself on delivering a very rich and powerful sound which has been described by many as ‘wild’!

This is all thanks to the spiral Louver design that can be found at the core of this product, circulating the sound, so it builds up in intensity. However, this is the only feature that this muffler provides.

To start with, this beautiful device with its gorgeous purple finish is proactive when it comes to decreasing the backpressure of your engine and can even help to boost your overall horsepower.

This ensures that your engine is running even more powerfully than before, giving you the speed and volume, you’ve been looking for.

In terms of spec, this is a 16-inch gauge device with a 3.5-inch diameter steel shell that’s reliable and highly durable, completely minimizing the risk of it breaking while you’re using it.

The slip-fit design means that the installation of this muffler is effortless, all coming together to make this one of the best mufflers of the market.

  • Slip-fit design for easy installation
  • 3.5-inch steel frame for outstanding durability
  • Produces a rich and powerful sound from your engine
  • Decreases backpressure and increase horsepower
  • None!

Cherry Bomb 87522 Glasspack Muffler

While a little more expensive than the rest of the mufflers on this list, the Cherry Bomb muffler is a truly wonderful glasspack creation that is designed to maximize the level of sound your engine produces, all while providing your vehicle with a beautiful red aesthetic.

This muffler comes with an 8-inch body with an overall length of 12-inches once you’ve included the inlet and outlets. Width-wise, this muffler measures 3.5-inches in diameter, making it a universal fit for the majority of vehicles or header styles.

As with most of the best glasspack muffler’s, this particular model prides itself on its straight-through coil design which allows the sound to bounce around the coil, amplifying in sound as it goes.

This is the exact opposite of an angled interior which quietens the sound, ensuring you can be as loud and as obnoxious as you please!

What really sets this muffler apart is the fact that it’s been continuously produced since back in 1968.

This makes it incredibly easy to notice the experience that has gone into this quality build, ensuring you have a muffler that’s going to last for many years to come without any reduction in the quality of the performance or the sound.

As with all premium quality mufflers, this device will help to decrease the backpressure in your engine, naturally reducing the heat of your engine underneath your hood, as well as maximizing the amount of horsepower that your engine is generated.

That’s more power, less heat, and less pressure, increasing the quality of your drive, all in addition to the iconic Cherry Bomb sound that’s produced. This sound is renowned for being raw and gritty but remains mellow and smooth. In short, this device is sure to make you the envy of your neighborhood.

  • Generates the classic Cherry Bomb engine sound
  • Universal compatibility to be installed on any vehicle
  • Beautiful Cherry Red aesthetic design
  • Increases horsepower and decreases backpressure of your engine
  • May not be as loud as other models on this list
  • Some might consider the sound to be too much of a ‘growl’

Thrush 24205 Glasspack Muffler

Thrush 24205 Glasspack Muffler

If you’re looking for something with a bit of power to really rip out those sounds while you’re driving, this heavy-duty muffler is sure to leave you feeling very impressed indeed. Produced using continuously roving fiberglass materials, the Thrush Glasspack Muffler is sure to turn heads wherever you go.

Designed with a heavy-duty gauge shell, this muffler device oozes quality and is guaranteed to be with and your engine for many years to come, regardless of how hard you plan on pushing it.

Once installed, a process which has been made effortless, you’ll be able to enjoy a long, sustained and truly superior sound that you’ll fall in love with instantly.

What we love about this muffler is the fact that it’s been designed with a dual outlet mode. This maximizes the air flow of your muffler, allowing you to produce a sound that’s out of this world.

Furthermore, you’ll also find expandable bushings with this device, meaning you’ll be able to apply it to any kind of custom application you see fit. This means all the boxes you’re thinking of are ticked, making this one of the only glasspack mufflers you’re ever going to need to buy.

With a stunning red design or stainless-steel option available, these 3.5-inch wide muffler is designed to fit any of your vehicles in a universal fashion, meaning minimal fuss during installation so you can get back to doing what you love the most, only this time with a superior sound upgrade.

  • Beautiful hot red design
  • Duel outlet design for best sound quality
  • Universal compatibility with all vehicles, cars, and trucks
  • Affordable and competitive price tag
  • Produces a low rumble sound that might not be to everybody’s taste
  • May have to weld during installation for best fit on some vehicle models

Flowtech 50252FLT Red Hots Glass Pack Muffler

Flowtech 50252FLT Red Hots Glass Pack Muffler

For our final glasspack muffler on our ‘best of’ list, we’ve returned to the Flowtech developers for another truly outstanding design that’s sure to tick all the boxes you have in mind when it comes to purchasing the perfect device for your vehicle.

Just like the other 50225 model above, this muffler helps your engine to produce an insanely rich sound that’s incredibly powerful and, as some would describe, as being Red Hot to listen to. In fact, when you’re putting the pedal to the medal, this is a muffler that can become deafening. This is all thanks to the 3.5-inch solid tube and the technology within.

However, this tube is crafted using metal, but rather a ceramic-glass mixture that wraps skillfully around power louver core that’s the sole technology used to amplify your engine’s sound. This all comes together as a professional piece of kit that’s going to leave jaws dropping on the floor.

In addition to the outstanding sound quality this muffler produces, you’ll also be able to enjoy a further range of features that this device provides. This includes the ability to decrease the backpressure of your engine, to protect it when you’ve put your foot down.

This device also actively increases the horsepower of your engine, help you go faster, harder and all while giving your engine a longer header life and even helps to lower your engine’s under-hood temperature!

Finally, with a beautiful red-hot finish, as well as a rust and corrosion resistant finish, this could easily be the only Glasspack muffler you ever need to buy!

  • Ceramic-glass creation for outstanding quality and durability
  • Resistant against rust and corrosion
  • Helps to lower backpressure and underhood temperatures
  • Increases the horsepower of your engine
  • Some drivers may not like the rumble it produces
  • A few faulty batches in circulation


As you can see, when it comes to producing rip-roaring sounds for your performance vehicle, there are so many glasspack mufflers out there to choose from, it can be difficult to know that you’re making the right choice.

However, all four of the mufflers we’ve listed above are truly outstanding and guarantee to get the job done. Simply choose the one that suits what you’re looking for, and you’ll be ready to go!