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    The Muffler Doctor

    4.7 (162 reviews)
    Closed 8:00 am - 5:00 pm

    Services - The Muffler Doctor

    Bumper repair

    Auto frame testing

    Rear-end damage

    The Muffler Doctor Photos

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    Recommended Reviews - The Muffler Doctor

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    The finished product, nice exhaust tip and sounds good.
    Pedro F.

    Ernie and the crew had my 2001 F250 diesel truck up and ready in a few hours. My truck had what can only be described as a tin can at the end of it which made it sound like ish. Ernie made some recommendations based on the fact my dad drives this truck daily to and from work and I didn't want it loud and more obnoxious than it was. The finished result was awesome. Muffler and exhaust tip look better than factory. The sound is just right

    Ek9 getting the Mugen twin loop treatment....
    CG N.

    What can I say, when it comes to getting work done, Ernie is my go to. Guys been here for Years and knows his stuff. In and out. Quick and way and I was ready to go! He's fair on pricing., reliable work, and knows a few things about cars as well. I'll be having him do my truck next.

    Mark S.

    The Muffler Doctor, where they won't necessarily put all the bolts back in and, when they can't find your bolt and see that the gasket is broken, will glue the flange as a quick fix. I'm impressed! Yeah, not really. There is no excuse for not doing it right the first time.

    Adrian E.

    IF YOU NEED EXHAUST WORK, DON'T GO ANYWHERE ELSE. I was recommended by one of my best friends to come here and of course I had to go the first chance I got. I am so glad we have stumbled upon this exhaust shop. Great people, stellar customer service, speedy service and unbeatable prices! I came here to swap my OEM resonator with an aftermarket Vibrant bottle-style resonator and the price was only $50 out the door. The work only took about 25 minutes and the owner was super friendly and understanding while I was filming for my Youtube channel. I was able to film and watch the whole process safely. Luckily for me this shop is close, but honestly speaking even if it were 20-25 miles away I'd make the drive down knowing how great the work and their service is. I doubt this will be my last time here for some exhaust work so I'm looking forward to my next visit! Be on the lookout for the video to get more in depth footage of the shop and the work that they did. I left the shop ecstatic and ready for more exhaust work to be done! Youtube Video of Installation: https://www.youtube.com/watch?v=dn31AiyxUlQ&t=106s

    Garage Area
    Francis N.

    Came here to have a J-Pipe installed on my 3 inch catback exhaust to kill my freeway drone in the 3k -4k rpm range. I did all my calculations at home, brought the Vibrant piping needed for the job, and asked Ernie if he could fab up the piping for me. I was in and out in less than 2 hours and paid a very reasonable price. Welds look good and the shop did exactly what I asked them to. Would 10/10 recommend to any friend needing custom exhaust work done to go here.

    Ernie
    Jimmy T.

    Went to "da shop" yesterday to get my TRD Muffler repositioned because Advance Muffler Shop of Riverside didn't do a good job. However their rating would be on their Yelp page, not this one. Ernie saw the exhaust set up and immediately asked "Where'd you get this done?" And "Did the shop owner really leave it like this?" Big time SMH. I had called and made an appointment for me and my friend and we drove to Montclair and arrived on time. My buddy got my old set up on his car and I got my exhaust repositioned. We were both charged fair and reasonable prices! Just wanted to make an update review to show the shop some love! Never a disappointment coming here. Third Review: 01/17/20 I'm moving on from a 2006 Toyota Matrix (1ZZFE) to a 2003 Toyota Matrix XRS (2ZZGE) and I've decided to make my daily bone stock again! At first I was debating whether to save a trip by going to the local shops in my area, but I saw the reviews and immediately considered staying with the OG. Uneven welds and a lot of money spent is TOTALLY NOT WORTH IT. Scheduled to meet with Ernie today in the morning an hour after opening. I had to wait a little bit but that doesn't concern me at all. I conversed with another gentleman there about his lowered 2001 Suburban! Will definitely come back next time when I get the project car. Always a great experience here at the Muffler Doctor. Big thanks for their services!

    Stock mufflers.
    Tosh S.

    Amazing service.. I called mid week spoke with Ernie. Appt next day!! - nice!! I go there hes like muffler delete and add some straight pipes? Yes sir!! Drive it on back I'll meet you around back. They put it on the lift immediately. They have low ramps for lowered cars too. 2 guys jumped on to help. Started cutting out the stock mufflers. Measuring for the straight pipe. Lined it all up nice bends in the pipes (photos soon to come) and welded tight. Car Sounds awesome!! I payed cash. Was in and out in less than an hour. I will recomend this place to others!! Fast, detailed, & extremely reasonably priced. Thanks Ernie!! Shop owners cool too!!

    Dual 4-in tips on civic hatchback sport
    Joseph L.

    Called them 9am in the morning and asked if they had any open slots for the day for a resonator delete. Got to the shop at 10:30 and they finished everything by 11:30. Shout out to Ernie for being super straight forward and the fast service! Would Highly recommend!

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    6 years ago

    Excellent work! Very friendly and helpful with my install. Good quality work at fair prices.

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    7 years ago

    Good work but will change the price on you, ones they see you having a fix up car they see dollar signs..

    Business owner information

    Photo of Ernie S.

    Ernie S.

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    7 years ago

    Great service very friendly very knowledgeable definitely will be coming back for all my needs

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    7 years ago

    Ernie is awesome. Great quality of work and pricing is fair. I will be returning for any of my exhaust needs .

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    7 years ago

    Great work on classic rides... I had dual exhaust put on my C10, it came out!!! Good quality, that's worth the price.

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    Page 2 of 5

    Ask the Community - The Muffler Doctor

    Good morning: do you perform the "Gundo Hack" muffler/exhaust job for the 2002 Porsche 911? If so, what do you charge and what how long will that fix take?

    no sorry

    How much is a muffler delete on a 2020 Honda Civic sport SEDAN 2.0L?

    call shop

    I have 2016 Camaro V6. I want to do backfire/pop ECU. Can you guys do it here?

    no sorry

    Whats the estimated cost to diagnose a possible clogged cat and replace it?

    call shop

    Muffler delete for a Mazda 3 hatchback 2015?

    call shop

    I have a 2010 BMW E90 328i, if I bring the muffler, how much would the install be?

    Instead of asking for the quote on here, I'd give Ernie a call at the Muffler Doctor. (909) 445-0024. Prices are fair and reasonable, so no need to bargain for any lower. If you spread the word to your friends and family, you'll get hooked up. As… 

    How much to get my Camaro ss muffler delete installed?

    $110 for a muffler delete on a camaro ss

    Who makes the 439 dual exhaust muffler?

    Corsa

    I have a Honda Civic 2016 LX Sedan and the exhaust is on the right side, if I want to change the exhaust to the center or both side would it be possible? If could, how much would it cost?

    Yes it's possible. We have to see the car first

    How much would it be to get carven exhaust on a 2011 camaro?

    Around 400 for the mufflers installed

    View All 15 Questions

    Review Highlights - The Muffler Doctor

    It only took Ernie 20 minutes and my car is completely fixed with no rattling or humming.

    Mentioned in 90 reviews

    Read more highlights

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    Super Service of Pomona Valley

    Super Service of Pomona Valley

    4.6
    (710 reviews)

    So helpful, had a mix up on appointments and was able to come in the next day. Fast and easyread more

    My Pros: Paul was the main guy who I consulted with and he…read moreis overall very chill and cool guy (complimented my taste in music, thank you~). He has great customer service at the front desk and answered any questions and concerns I had. He offered a rental car or a free ride back home (which is the services they provide). The driver was very kind, friendly and safe driver. My car went in for diagnostics, after inspection, I gave a go to replace the clogged CAT. They gave me a very great inspection report, full with pictures and easy to read descriptions (I also very much like the 3D video explanations to which parts they are referring to). For now, it runs a lot smoother and I'm very happy with how my car runs (I haven't driven it long enough yet). I drive the most in my family, so it feels great to get things I need done now. :) My cons: I would say communication could be a little better. I had dropped my car off 5/29 and didn't get it back until 6/12. It's the longest I've ever had my car stay at a shop, and I will admit I was uncomfortable with how long it stood there. I did feel strung along the entire process, as I was told multiple different dates when my car should be finished. I had to call the shop a good number of times to get an update and I hate having to call to ask the same question over and over (felt like a kid on a road trip constantly asking "are we there yet?"). So, I'm not sure how their process goes about when taking in cars, if maybe they take a little too much than what they can handle time-wise or if maybe scheduling an appointment with them would make a difference? I didn't find out what the issue was until I had come in to pick up my car, to which I am very understanding that things happen, but I wish I was informed during the phone calls I had made. I'm aware of the excessive amount of problems there are with CAT's and they had informed me that the CAT's were being stolen during transport before they even reach the shop or customers (which is such an issue in itself, that ticks me off), so the shop had faced delay due to those circumstances that were not in their control. :) Overall: Pretty good and very kind set of guys that work there. Communication with the customer could be better, so I didn't have to feel left in the dark. Would prefer accurate finish dates and with explanation if there is ever delay (I did refuse a rental car in the beginning because I was told inspection would be done the following day if not till very early next week, but then a few days became 2 weeks) so, definitely want more accurate times to plan my days that I don't have a car. :)

    The Muffler Doctor - bodyshops - Updated July 2026

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