After working with Felix, it is easy to see why people recommend him so strongly. For my 2026 Supra 3.0 MT, he handled my Femto ECU unlock, installed a Motiv flex fuel kit (with ethanol sensor), and got the car dialed in with an AMS downpipe, AMS charge pipe, Eventuri intake, and a Valvetronic exhaust, plus dyno calibration/tuning. He also upgraded the suspension a bit — Eibach springs + sway bars, SPL rear toe links/lockouts, MMX spacers, and a proper alignment later and the car handles noticeably better and is much more fun to drive. Everything was done cleanly and correctly and I could not be happier with the results!

His shop is super clean, organized, and clearly run with a lot of pride and attention to detail. Communication was great the whole way through (updates, pictures, timelines, etc.), which really made for an all-around positive experience. I will definitely be coming back for phase II (and III), and anything in between.

If you’re in the Raleigh/Garner area and want your performance car built correctly by someone who genuinely cares about the outcome, Built by Felix is absolutely worth it.

Felix is awesome! I recently had a consult appointment to discuss some upgrades to my BMW 2026 M440. I’m also having an issue with my seat and Felix took valuable time out of his busy day to troubleshoot and improve it right then. That’s customer service you can’t find these days and his skill and reputation for complex builds and performance upgrades speaks for itself.

was my first time at Built by Felix, and I had an excellent experience. I went there to unlock the ECU of my BMW, and the service exceeded my expectations. Although I didn’t get the names of the staff who assisted me, they were extremely professional and attentive, paused their work to help me, and completed the ECU unlock quickly and efficiently. It’s clear they have strong technical knowledge and care about their customers. I left very satisfied and highly recommend the shop.