What Are Glass Packs For

There are a number of different ways to upgrade and modify your vehicles exhaust system. By swapping out your cars muffler with a glass pack muffler, you can affect the noise level and performance abilities of your vehicle. You should consider all the possible side effects of altering your exhaust system before you put a glass pack muffler on your car or truck.

What is a Glass Pack?

Glass pack mufflers are designed to allow air to flow directly through the exhaust pipe and reduce back pressure. The exhaust channel of a glass pack muffler contains a fiberglass barrier, which helps muffle the exhaust noise. Glass pack mufflers do not contain baffles, which slow airflow through the muffler. Glass packs typically do not muffle as much sound as stock vehicle mufflers, so installing a glass pack will probably make your vehicles exhaust system louder.

Availibility and Cost

Glass pack mufflers are widely available from a variety of different manufacturers. In terms of exhaust modifications, glass packs are a relatively inexpensive modification. In most cases, you will be able to purchase the glass pack itself for less than $50.

Pros and Cons of Glass Packs

The main benefit of installing a glass pack is that you may be able to improve exhaust flow and reduce the amount of back pressure in your exhaust. Back pressure is created when the flow of exhaust through a muffler is restricted. Depending on the type of vehicle and engine, reducing back pressure can improve performance by allowing exhaust gases to flow out of the vehicle more quickly.

Legalities of a Glass Pack

The laws governing automobile exhaust modifications will vary, depending on the area in which you live. You should check your state and local laws before swapping out your cars muffler for an aftermarket glass pack muffler. States where emissions testing and inspections are done are the most likely to have laws affecting the modifications that can be done to an exhaust system. Failure to obey exhaust and emissions laws can lead to fines and even the loss of the ability to drive your vehicle on public roadways.