Underpressure Power & Performance

I cannot state enough how amazing the entire team at UPP is! Seriously they have had my husband's car a handful of times and besides quality work they have helped troubleshoot over the phone even! I'll never take my car to another shop, if you are thinking about going with under pressure, do it. You will be happy you did!

Great experience with dyno tuner Chris Nelson and shop staff. Everyone was very knowledgeable and provided really great customer service. Chris tuned my 1971 Alfa Romeo with EFI running a MaxxECU. Drivability is greatly improved. The array of cars on deck to be tuned was vast and it was clear Chris and UPP know their stuff and can handle any tuning project. Highly recommend. I’ll be back in the future for sure.

I have been very satisfied with everything they have built for me they do good work especially nice welds they have built heavy equipment parts that are no longer available and repaired parts for me. Very satisfied will use them in the future im sure.

Took our 62 Chevy C10 in to get tuned and dyno’d. Mike did a great job on our SB 400 and she runs great. Highly recommend these guys. Thanks Savannah for all your help and keeping me updated.

$12K and 7 Months of Waiting… This is my third time updating this review—and after finally spending time driving the car—I can confidently say I’m not happy with the results. After six months, I got the call to pick up my turbocharged RSX. Naturally, I was excited… until I saw the condition of the car. One of my side skirts was missing. The washer fluid reservoir was zip-tied in place and flopping around. Worst of all, the charge pipe was hitting the shifter linkage, causing the car to pop out of second gear. Loud rattles were everywhere. And to top it off, the ECU wiring I was charged for—AFR gauge, boost controller, boost gauge—wasn’t even completed. They took the car back for another month to address these issues. To their credit, the fabrication on the upper and lower downpipes was