This is definitely the spot.The place to go where you want your exhaust system either have that deep, loud tone... or if you just simply need some Muffler work or need Catalyst converters installed.These guys are very good at what they do. And fast at what they do.The shop is very family oriented, and will welcome you with love.Much respect for Sierra Mufflers.

Jose at Sierra muffler does quality work in less time than his competitors and at a fair price. Very professional and great communication. My catalytic converter was stolen out of my Honda accord and Jose did custom work to replace and repair my exhaust. I can’t thank him and Sierra muffler enough!

Went in and had a Borla Atak installed on a 21 scatpack. In and out in about an hour. Guys at this shop are super friendly and the cost is within the ball park. Highly recommend to get your exhaust/muffler installed at this shop.

Ask for Junior. Awesome deals and get it done how you want.

They were very polite and super friendly. Would definitely reccomend!

Repaired issue great service 👍

Cool people work with you weld real well did a custom exhaust on my civic si

I was in and out in no time. They installed a new catalytic converter. Mine was stolen. The did it for $630. Midas wanted $3200.

Awesome guys! If you guys want a louder exhaust without spending 800 dollars or more for one I recommend this place making it sound as good for less that 200 dollars!

Very pleased, great job, excellent price

These dudes charged me $300 for labor on a muffler delete. Personally I would not recommend this shop I feel like this was way over priced.

When I called they pick up the phone and hang up on you. Bummer

Shout out to them fixing my exhaust leak that another muffler shop failed to do twice. Pretty reasonable price too. It took them a awhile to get it done but it was worth it. They did a wonderful job

Took my Hellcat in for muffler and resonator delete. Great experience - Daniel and the team was very friendly and professional. Definitely recommend and this will be my go to shop.

They are absolutely amazing! I highly recommend them! Great people great place

My experience with Sierra Mufflers was a good one. They show and talk with you about the problem. I do not believe that they are too expensive. They do a good job.

Good experience.. owner is very fair and kind and professional

Quality work and reasonable pricing. Very happy with my flowmasters!!

Very happy with my experience. Very professional workers. Got a custom exhaust on my Subaru Impreza and let me just say, they did an amazing job getting the fitments and welding done correctly. I waited a few days to see how the new exhaust felt before submitting a review. Also, the pricing is very reasonable depending what you’re getting done. I would come back again with my other cars. Thank you!

Great customer service. Also the sale team guided me on what I should get for my ride....thanks again Sierra Mufflers....

Different exhaust shop messed up my entire system these guys fixed it really well and for a great price strongly recommend

My friends and family have been going to this wonderful family owned business for over 20 years and have never ever had an issue. My mom gets her car smogged there as well and always has been treated with respect and like family. Thank you.

Took my 370Z in to upgrade my stock muffler to AAM Short Tails. They were very helpful and got the job done quickly, and they were attentive to my needs (I wanted my tips a certain way). They adjusted the pipes to fit perfectly. I definitely plan on coming here again for future upgrades.

Guys came through and had my exhaust fixed quick.

The staff, the quality of work, and pricing is great. These are awesome knowledgeable mechanics who work on more than advertised. They put their customers first and did an amazing job on my vehicle.

Great service! Great prices! Was in and out . Will be returning soon

I use to go there for a smog and recently went for exhaust leak,they took like 3hr to fix and now the leak is back...they lost a customer...

They were really professional. They are very experienced and it shows. Quick and easy, no hassles. I definitely will be returning for future services.

Trust me go to this place. Very kind and helpful, gets the job done.

I brought my dodge durango to do exhaust work. They did a great job and it sounds great. Very nice people. 5 stars!

I brought my dodge Durango to do exhaust work. They did a great job and it sounds great. Very nice people. 5 stars!

Great people great service

Best shop in Modesto hands down!

This establishment is very fair and honest Ive been going there for about 2 years now and I wont go anywhere else they stand behind their work and they are fair and reasonable

Fast and friendly service good pricing. Got my car up on the rack

Great deals DAMM the bay AREAMY catalitic CONVERTOR WAS GOING TO COST ME 1.300 IN THE BAYAREA HERE IN MODESTO INSTALLED $300 PLUS TAXTHATS WUTH LABOUR

Great prices good guys.. even offered coffee while I waited.

READ THIS BEFORE COMING HERE!!!Please do not pay attention to other reviews or the rating and make the same mistake I did. The is my second review I have ever written and my first negative review I have ever written. Ive had bad experiences before but this one was so bad I am actually taking the time to write this out so it doesnt happen to anyone else.If I would give them a negative rating if I could. I took my 2011 Lexus there because it has a muffler delete and I wanted to get the stock mufflers put on. They get it up on the lift and take a look at it and say itll be $100 to complete the job and I say okay thats fine. So I stand outside off to the side and wait for them to finish. After about a hour they finish and get the car down from the lift and say they are done. I take a look at it and I see that on the right muffler they welded the muffler piping on the outside and on the left muffler the put the piping inside the muffler tip and then welded it. So the left muffler I can see the piping sticking through the tips and on the right I cant. So I tell the guy that they are different and if they could make them the same. I didnt want the piping showing through the muffler tips. The mechanic said okay I see what you are saying, well get it up on the lift. Then the owner or whoever sits inside came out and talks to the mechanic and in Spanish was asking the guy what was the problem. So the mechanic explains to him what I was saying and the owner was flaunting his arms and pointing at the car and pointing at the road saying he just wants me to leave. The mechanic comes over to me and before he could start talking the owner comes over and asks me what the problem is very very very rudely and loudly. I was a bit surprised because I didnt know why he was talking to me like that since that was the first time I had talked to him but I just didnt think much more of it and I told him that they werent even because on one side I can see the piping sticking through the tips and the other side I cant. (Still talking extremely rudely and loudly) he says nothing is wrong with the car and I just need to leave. He said dont worry I dont owe him anything just leave. I was still confused at this point because I didnt know what had happened or why he was saying that because I still thought everything was fine and I was just telling him my problem and if they could fix it. He then said you know what the problem is, you dont want to pay I can see it in your eyes. I looked at him dumb founded because I hadnt said anything near that. The entire time I was saying that they arent even and I just wanted that fixed. I told him I never said I wouldnt pay I just want it even and fixed. He said no they are even, you just dont want to pay thats what the problem is. So I take out a $100 bill and show him and say look. You see this. Here is your money. He then says you want it fixed and yells at the mechanic to get my car up on the lift again and says hes gonna fix it and once its fixed I need to leave and walks inside. The mechanics that were there come over and apologize for the owner and say hes having a bad day (it was 9am) and that they would fix it. They got it up and fixed the original problem and I paid them and the mechanic apologized again and I left. It was such a horrible experience and I am a business owner myself so I can understand that it can be stressful dealing with a rude customer but I hadnt even said or talked to the guy. I would recommend any other mufflee shop but this one. I went here because it had good reviews and a good rating but its complete bullshit. Do yourself a favor and dont come here. I hate to say it but I felt like I was being discriminated against but I didnt want to create a issue so I never said anything. I just wanted my car fixed properly and to leave.

Great work, great staff & great prices.

Great quality work at a very reasonable price!

They did exactly what I asked them to do they did a great job couldnt ask for a better job and everyone who works there is very nice. I went to Sierra Mufflers twice and both time they did a great job.

Great place.Clean, cheap, and friendly establishment.I installed some magnaflow mufflers and a couple of tips for my 2015 Silverado. Awesome job.

Great job. Very clean work. Best around!

I took my vehicle to other places giving me high prices. Brought it to these guys and found out it was the resonator and gave me a reasonable price.

Placed a order with 100 dollar deposit waited 5 days and still haven’t heard anything, called to check on the status Of the part,Was told they would give me a call back when they had their shipment come in was never called back or had a return call ended up calling on Monday just to have Louie the guy who answers the phone be very disrespectful and rude and blame me for him not ordering my part do not recommend this place to anybody.

Liars terrible service on the smog side only person worth a dam was the welder dont come here Id of paid triple anywhere else then come back to this place

They are the cheapest, nicest guys. Great place.

Great customer service, great staff, fair price, and great work quality. Thank you.

Dont go here ... TRust me had to go back 3 times for the same thing.. They need better welders.and nicer people to work here!!!! Still had to go and have a nother muffler shop fix the problem.. if ur not mexican or a man plz dont wast ur time with this place .. very un professional...

They were very friendly and helpful.

They were very helpful, great overall service. Thank you.

Amazing Customer service. 💪

Good job. Fast and nice.

A1 service and attention to detail.

They work with you i always take my cars for repairs or custom work

They are very friendly and helpful.

Fast and friendly service

To expensive. When they look at the job they have to do on your car they tell you one price but at the end they charge you more.

The Best :)

Best service

Super good

Good price

Great work!!

Very attentive they should not close for a day 😄

Very good and fast service

Good service good attention ...

The Red

Excellent service