Custom Exhaust Systems

A Wide Range of Exhaust Products and Services

Welcome to Lou's Custom Exhaust, your one-stop shop for high-quality exhaust system repairs and customizations. Our expert technicians have years of experience in repairing and customizing exhaust systems for all types of vehicles.

At Lou's Custom Exhaust, we understand that a damaged or faulty exhaust system can impact the performance of your vehicle. That's why we offer a range of products and services to ensure your vehicle's exhaust system is running at its optimal level.

We don't have to fix your entire exhaust system; we cut out the problem and repair your exhaust for you. This saves you money over replacing the entire system. If you are looking for top-quality auto exhausts in Dorchester, MA, feel free to contact us. We're waiting to help you!

The Finest Exhaust System Products

Lou's Custom Exhaust crushes the competition on price, quality products, and our highly skilled craftsmen. We don't have salesmen to oversell you something you don't need. We provide honest repairs with the longest no hassle guarantee in the exhaust industry.

Get a 1-year warranty on aluminized mufflers and a 5-year warranty on stainless mufflers - both with free repairs and no pro-rating ever. We do not charge labor or service charges on any guaranteed product. When we say free, we mean free. View a list of our products below:

Lou's Own SS Signature Series Muffler

At Lou's Custom Exhaust, we are constantly looking for new products and better materials to offer to our customers. In 2006, we developed our new Signature Series mufflers - a new innovative line of mufflers developed for our performance customers.

Two Chamber High-Performance

With 40 years of experience installing muffler systems, we determined that we could create a better muffler using our own design and manufacturing process. The 2-Chamber SS muffler was designed for our customers interested in performance gains and well as an aggressive deep tone. This was accomplished by increasing the internal flow diameter and using thicker 14-gauge aluminized material (the industry standard is thinner 16-gauge). The result is our most aggressive-sounding performance muffler.

SS 409 Pro Turbo Stainless Mufflers

Classic car enthusiasts have continuously asked for a deep performance tone muffler without the loud resonance in the vehicle created by many of the highly advertised mufflers on the market. We took the challenge to create a muffler that increased horsepower and at the same time produced a low deeper tone.

The SS 409 Pro Turbo stainless muffler has become so popular we have added additional designs to this popular design. The SS 409 Pro Turbo is now available in a Truck Pro Turbo, Import Pro Turbo, Dual Muscle Car Pro Turbo, and Dual Truck Turbo as well as the original Classic Car SS 409.

Flowmaster

Flowmaster has been the industry favorite for years. For our customers who live by the Flowmaster sound and name, we carry a full line of Flowmaster mufflers for any application.

40 Series

Available in Original Delta Flow and Super 40. Flowmaster's most aggressive muffler line. We carry both single and dual applications. This two-chamber design incorporates Flowmasters patented "Delta Flow" technology.

The "Delta" deflectors result in increased scavenging for better performance and reduced interior resonance over the standard 40 series with a nice growl outside the vehicle. Sounds great on late-model performance cars with catalytic converters. Constructed of 16 gauge aluminized steel and fully mig-welded for maximum durability.

50 Series

3-Chambered Design. Available in the regular 50 Series as well as the 50 Series SUV. The 50 Series is less aggressive than the 40 Series while still creating the great Flowmaster sound. The 50 SUV muffler reduces internal resonance created by performance mufflers. A great application for customers who spend a lot of their driving time on the highway.

This is the latest design of the 50 series muffler that utilizes Flowmasters patented "Delta Flow" technology along with a Helmholtz Chamber to eliminate most all interior resonance and still have that famous Flowmaster sound outside the vehicle. Constructed of 16 gauge aluminized steel and fully mig-welded for maximum durability.

Big Block

Flowmaster's answer to high displacement engines.

60 Series

Flowmaster's answer to the import craze. Designed for both foreign and American cars with 4 and 6-cylinder engines. The 60 Series incorporates Flowmasters patented "Delta Flow" technology to produce a nice mellow sound for your sport compact car and truck. A larger diameter tailpipe will create a deeper tone both inside and outside the vehicle. Constructed of 16 gauge aluminized steel and fully mig-welded for maximum durability.

80 Series

Traverse style muffler commonly used on Camaro style exhaust applications. The 80 Series is designed for applications where the muffler must be mounted transversely (cross-flow) behind the rear end. It provides an aggressive muscle car sound both inside and outside the vehicle. A replacement for early and late model Camaros & Firebirds. Constructed of 16 gauge aluminized steel and fully mig-welded for maximum durability.

Magnaflow

Another industry favorite is built-in stainless steel with a straight-through design. Magnaflow mufflers are popular with our customers with 4- and 6-cylinder vehicles. They also offer the largest muffler for customers with 8-cylinder engines who are interested in performance and increased gas mileage with a softer tone.

Satin Stainless

MagnaFlow Wide Open Performance original designs in long-lasting satin stainless steel in a variety of universal applications for cars, trucks, and SUV's.

Stainless Steel

MagnaFlow Wide Open Performance is now available in Polished Stainless Steel. The new muffler features a stainless steel body, end caps, and perforated core as well as a stainless steel weld bead.

Street Series

The Street Series is designed for the souped-up street machine. It features a high-flow tuning tube, balanced to the needs of the high-revving import engine. The Street Series emits a smooth, deep tone while offering improved performance over OEM equipment. The Street Series is recommended for street cars with bolt-on performance modifications and custom body kits.

Race Series

The Race Series is designed for the ultimate in high performance and an aggressive racecar sound. It features a true straight-through design for maximum high RPM pulling power and a 2.5" or 3" perforated core to virtually eliminate backpressure and maximize exhaust flow. The Race Series is recommended for serious racer, turbo, nitrous oxide fuel systems, or wild cam applications.

XL Turbo

MagnaFlow XL 3 Chamber Mufflers use a unique combination of large-diameter perforated tubing and strategically placed sound baffles to reduce unwanted resonance and help your engine create horsepower. The sound baffles tune the sound waves using calibrated tuning gate openings that allow portions of the waves to pass through.

These tuned waves reflect off the back wall of the muffler and cancel out unwanted harsher sounds. The large diameter perforated core eliminates the flow restrictions of a louvered-style core. A careful balance between perforation size/spacing and the baffle tuning gate makes for a great 3-chamber performance muffler.