-
January 2026 by Justin Tress
Mr. John was great! Fun to talk to, and very knowledgeable. He gained a customer for life. Very grateful for the amazing work he did.
-
December 2025 by Joe Bon
Did an amazing job on my Ford Explorer. Also checked my fluids in my differential and topped them off for no charge. John is a great guy and super knowledgeable! Great service!
-
October 2025 by Juan Mattei III
John is a great and honest guy!! He doesn't disappoint !
-
October 2025 by Ryan Daugherty
Just had my 1973 Ford Ranchero serviced here and could not be happier. John is a very nice and easy to work with. He has an impressive amount of knowledge, will make sure to steer you in the right direction and not take advantage. The prices for work were fair and he will not suggest unneeded repairs. It's hard to find a shop like this anymore and will truly return even if just to talk with John. Thanks for taking care of my baby.
-
June 2025 by Eddie lassahn
John, the owner of WMM&B is a truly honest, and trustworthy mechanic. He got my 1991 Cadillac Fleetwood brougham running better then ever before! His estimate was accurate, his turnaround time was speedy as can be, and his knowledge in motor vehicles whether new or old only further supports my trust in his work!
-
May 2025 by j\u0026r Madison
I had called several mechanics and muffler shops in the area and all of them just said to get what I wanted and they would install it for me. John at White Marsh Muffler and Brake spoke with me for 30 mins, at least, and shared his experiences with different expectations and muffler components he has used over the years. It was exactly what I was looking for. We ordered the parts, had them shipped to his shop and in no time we were called to pick up our ‘21 Denali. The install was great, John was great and our vehicle sounds awesome! Couldn’t recommend the whole experience more with John at WMM&B.
-
April 2025 by Francis Lazzaro
John is a true Motörhead, a knowledgeable mechanic that cares deeply about his craft, and a genuinely good dude. If you care about your vehicle, take it to him. He’ll go above and beyond. My 1990 S10 has never ran better. He rebuilt the 700R4 transmission, added a shift kit, replaced the flex plate and starter, built a custom exhaust, and after a long search found a brand new OEM GM cover plate. The man is a Wizard
-
March 2025 by Raymond Davis
Fast and Efficient!
-
March 2025 by Renard Lewis II
I had a great experience at White Marsh Muffler! Mr. John quickly diagnosed the issue with my vehicle and provided excellent service. He was professional, knowledgeable, and made sure everything was taken care of efficiently. I highly recommend their services for anyone in need of auto repair!
-
November 2024 by James Walker
The person who answered the phone is extremely rude it was 12.00 and he complained about keeping a car over night as I suggested, I was aware that they closed at 5 so I was okay with that, not ro mention he couldn't give me a clear answer of what I needed unless I was there.
-
September 2024 by Patient Trucker
Stopped by there today for some Exhaust work and All I can say is This Place is Awesome! Great Work and Great Customer service!
-
July 2024 by Alec Staten
He got it done fast and at a great price!
-
June 2024 by steve gilmore
John is the man!!!! I had an exhaust leak that made my car sound awful. John was able to quickly diagnose the issue and got me back on the road in no time. He is an expert at his craft. Had a great time talking to him about motorcycles as well!!! I will be using him for all my future car needs. Thanks again ??
-
June 2024 by Mark Yost
Great work at fair prices, and great conversations as well. Work was performed on time for price quoted, something pretty rare these days!
-
May 2024 by R H
Great experience. Reasonable Prices.
