Lou’s custom exhaust is located in:

How is a Quiet Muffler Designed

Ever wonder how a quiet, stock replacement, muffler works?  Look no further, we will explain below!

Mufflers are very interesting. They can improve your car’s performance. They can cancel out sound or add sound to the rear of your vehicle. Here’s how they work!

Located inside the muffler is a set of tubes. These tubes are designed to create reflected waves that interfere with each other or cancel each other out. Take a look at the inside of this muffle:


The exhaust gases and the sound waves enter through the center tube. They bounce off the back wall of the muffler and are reflected through a hole into the main body of the muffler. They pass through a set of holes into another chamber, where they turn and go out the last pipe and leave the muffler.

A chamber called a resonator is connected to the first chamber by a hole. The resonator contains a specific volume of air and has a specific length that is calculated to produce a wave that cancels out sound.

As always we do free estimates on exhaust systems, brakes, and other components.  Give a call or come by today, all of our shops are open Monday – Saturday from 8:30am – 5:30pm.

Plymouth 508-746-3500
Quincy 617-773-6500
Westport 508-646-1500
Hyannis 508-771-2500

Don’t Replace It, Repair It

Should I Repair or Replace My Exhaust?

Many times an exhaust issue ends up costing hundreds of dollars in parts to repair. Here at Lou’s Custom Exhaust in Hyannis, Plymouth, Quincy, and Westport we custom fabricate our replacement parts saving you a ton of money in the process without sacrificing quality. Great examples of this are catalytic converter issues and front flex pipe section repairs. In most cases it is less expensive in the long run to repair the parts you already own rather than purchasing a new ones.  We are also great at fixing plow truck exhausts which typically have manifold/downpipe issues.

For example, the cost on a flex pipe replacement ran range anywhere from $400.00 all the way up to over $1000.00 (if it has converter(s) built in). Here at Lou’s we can repair the flex section instead of replacing the entire pipe for under $175.00, parts and labor, on all but a very few specific systems. Not only that but our flex, unlike any you buy aftermarket, will come with a 2 year parts and labor warranty
Our catalytic converter replacements can save even more. If you have ever had one done you know the cost is very high, usually over $1000.00 installed. At Lou’s most catalytic converter repairs cost you $300.00 installed ($400.00 for california emissions vehicles, the part costs more) saving you tons of money.
So next time you are hit with a big repair estimate for something exhaust, brake, or undercar related come check us out for a free estimate before having anyone repair it..

We attached a few videos of examples of this if you are curious

Video 1
Video 2

Give a call to any one of our shops for a free estimate on your vehicle!

Plymouth 508-746-3500
Westport 508-646-1500
Quincy 617-773-6500
Hyannis 508-771-2500