I can't recommend BrenTuning highly enough. The folks here offer expertise without attitude. Their work is top-drawer. They won't waste your money. They're friendly. They're trustworthy. They're a little bit out-of-the-way, yes. But worth the detour. read more

I brought my Porsche here to get a second opinion as another shop said I needed to replace a turbo, which turned out to be false. Bren fixed the issue and I also upgraded my intercoolers, added a Cobb Accessport, air filter, and spark plugs. My car is an absolute savage now. I definitely recommend this shop. Chris and Tim are great. I'm hoping to add more power to the car very soon. read more

This guy knows his stuff. He tuned my 16 Subaru WRX. I had a full tune then a base tune. Never had any problems yet. I was disappointed that he ran out of ink so I couldn't get a dyno graph but it is was it is. Full tune was $500. Re-tune was $300 Car was there about an hour each time. He knows his new FA motor WRX's for sure though. Car is now making good power 330+ at the wheels for a WRX NOT STI read more

Bren Tuning - Auto Customization Near Me - Upton, Massachusetts

The guys at Brentuning are amazing. They tuned my 21 Fireblade in oct of 2021. The tune made a huge difference, and they got to it right away. read more

These guys are the best in the area for any car service, whether it's tuning, maintenance, installs, etc. They have done most of the work for my 2015 STI and have made it super reliable while addressing any issues I had with the car with short notice. Thanks to Bren, Tim, and the rest of the team for such amazing service! read more

If you want a smile plastered across your face every time you drive your car, then this is the place. (Pretty sure they can make an Elantra fun) I would give it 10 stars if I could. Awesome place! It's worth taking your car there. They've work on two of my cars (Forester XT & Cooper S) and I am extremely happy. The entire team is extremely knowledgable, friendly and more importantly HONEST. They'll advise you on whats best for your car and your lifestyle. You might want an air intake (or any other part), but if they see no need or benefit they'll let you know its not worth it. Other shops might just install it and take your money. read more

BrenTuning has worked with me on my S1000RR's, my Ducati, and my Porsche Turbo. All amazing experiences and amazing customer service. It's hard to find a shop that takes pride in their work and genuinely cares about their customers. BrenTuning is definitely a shop I would recommend to friends and family. I just wish I had more cars and bikes to make faster with them! The power I've made with my vehicles is second to none. I have shelves of trophies thanks to these guys and hope to get more in the future. read more

So far so good! I ordered a handheld tuner for my Ducati. Will check back in once I get to use it

I have a Bren Moto map on my 2018 Aprilia Tuono RR and am amazed with the performance gains after installing their 91tune and an Akrapovic slip-on. Power all over the place and the throttle response is smoother than ever. The process to install was super easy as well and Chris was really helpful. read more

Scheduled an appointment dropped off my car. I was told my car was untunable. I was told they diagnosed the car so I would not get my deposit back, however through their diagnosis they cannot give me the reason my car is untunable. Check engine light for catalytic converter but clearly you get one for a aftermarket part. Tuning might be fantastic but they didnt even look at my car I picked it up with the same miles it was dropped off with and not single clue on what is wrong with my car after their diagnosis. Scanning codes is not a diagnosis of the car. I talked to one of their techs and he was just spinning his wheels and told me someone would contact me 3 days ago. They might be good but they did me wrong read more

We are very lucky as Porsche owners to have access to some very knowledgeable shops depending on your geographic location. If you live anywhere near Worcester County you know that getting to a dealership isn't convenient. BrenTuning has taken care of all of my factory maintenance on my 991TT and I have to say his prices are fair and the mechanics are second to none. I found the shop as they were authorized to perform a tech inspection for a DE event a couple of years ago. Bren, the owner, knows the platform very well and suggested a basic Cobb tune paired with a PDK tune. I'm so happy that I took his advice as he was able to unlock more potential and my car is even more fun to drive. I'm usually a new car every 3-4 years person, but with the tasteful modifications they have recommended and installed, I love my car more and more each time I drive it. I'm very happy to have discovered Bren and his team and look forward to making my car faster and safer for more track days in the future! read more

I had gone to two "reputable" other shops in Connecticut who promised but failed to deliver. After 2+ years, I could not get a NY State inspection for my GTR. One tuner said, "Oh, just get it registered in NH, like my other clients do." Well, I guess he could not care less that your car's OBDII monitors are on and that the inspection is none of his concern. Bren Tuning was a referral from Wicked Motorsports, a real race fabrication shop. I left the car at Bren a couple of days and had it all sorted out. It turns out the previous tuner incorrectly installed the downpipes and there were multiple exhaust leaks and broken studs on the turbos. Even with all these problems, I got my inspection for NY several days later. They could do what other shops only promise, with no fuss and no "song and dance." Additionally, they have "real shop" with their own Mustang Dyno and a large shop area with a number of lifts. The two customer cars there were a McLaren and a Porsche GT3 there for upgrades. So if you want to suffer, go to Connecticut and spend money and do not complain, when you car is not sorted out in any way. Or you can go here and enjoy driving your car the way you want it. read more

I went to their shop to pick up a friend who was having work done. I noticed they had a nice motorcycle inside the waiting room that was the same make and had a similar engine as mine. I asked if they did bikes also, and said I needed to get some maintenance done for the spring, specifically mentioning it was time to replace my cam belts. I showed them pics of my bike to show them it was a custom build, but very similar to what was in the waiting room. They told me they could do the service. They then asked me for the original make and model so they could give an accurate estimate. The estimate was fair and I was told there was a 1+ month waiting time to schedule and that a deposit was required to be put on the schedule. So on Feb 14th I paid them $150 deposit and got a service date of April 24th (over 2 months out). On the day of my service I drove my bike there and coordinated a ride home. The next day (25th) I called them to mention that I might need something else done, and thats when I was told, "Oh, yeah well, we were going to call you. There's a problem and we can not work on your bike". I asked why, and thats when the excuses started. First one was, "The bike has 26,000 miles, and to rip down (he tried to make taking the belt cover off sound difficult) we need pulley tensioners, and you didn't provide those so we cant work on it". So I left work and went to Ducati dealer to ask about tentioner pulleys. One of their mechanics asked me if the Bren guy noticed something wrong with a pulley. If not, he said changing them specifically because of the mileage isn't necessary. I then decided to go to the shop to see if maybe communication would be better with them in person. At this point we got into some other reasons that were far-fetched, at best. They said the couldn't do it because of some of the other mods (reminder: this is a specialty tuning shop that deals with MOSTLY MODS!). I think I gave up when they mentioned that my frame had the tail chopped and a hoop welded on with a new single seat installation, and because of that the mechanic was not comfortable. Bottom line is that they knew exactly what they gave an estimate on (2 months ago) when they took my deposit and made me wait all this time for me to get my bike there, and call the next day just for the "mechanic" to decide he did not prefer to do what was scheduled (and with very lame excuses why). Now it's April and every bike shop is booked solid. I also now still have to schedule another ride and time off from work tomorrow to go get my bike back. They're not the professional shop they claim to be. read more