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Welcome To Lou's

Lou's Custom Exhaust in Plymouth, Quincy, and Westport are all independently owned and operated custom exhaust shops.   We specialize in the fabrication of stock replacement exhausts, factory style exhaust repairs, performance exhaust systems, brakes, tuneups and more! We pride ourselves on our fabrication, welding, and installation skills developed through years of training and experience. 

Now Offering FREE on lift estimates and OBD2 scans! 


All of our waiting areas have Air Conditioning, Cable TV, water, and Wi-Fi. 


Problems With Catalytic Converters, Flexpipes, Manifolds , general exhaust leaks? Check out Lou's Services.




Click For Customer Testimonials


Had Lou’s install a performance exhaust today in my Jeep Grand Wagoneer. They shoe-horned my after-market y-pipe onto my manifolds, were able to re-use a 2 1/2” cat already on the jeep, which flowed into a 2 1/2"single in, single out Magnaflow 5x8x18” stainless muffler.

Deep, throaty tone, very quiet at idle, but pick right up when i step on it. Makes my worn out 5.9 liter sound great, but more importantly the straight through design gives the old truck noticeably more grunt, from standing to passing.

They beat my closest estimate by $300 dollars! Friendly guys working there, Marc is a honest guy. I might never roll up my windows again! Love that sound!

- Brendan Takki May 2009


Lou's Custom Exhaust, Muffler, & Performance in Quincy, Plymouth, and Westport crush the competition, not only with price, but top quality products and highly skilled employees.  We have no salesmen, no over-selling, just honest repairs with the longest no-hassle guarantee in the industry. 

We Have been installing foreign and domestic exhaust systems on all makes and model cars and trucks for over 40 years. We manufacture our own exhaust systems and pass the savings along to you. From stainless steel to chrome mufflers and 14 gauge exhaust pipes.  No job is too big or too small. Call us today at 617-773-6500 in Quincy, 508-646-1500 in Westport, and 508-746-3500 in Plymouth.

Lou's Custom Exhaust
Lou's Team

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