Customer Reviews
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“Insane difference after tuning with Griffin Built Racing! My N54 pulls way harder, and the throttle response is crisp. Isaiah helped me every step of the way. Highly recommend!”
— James R., BMW 335i (N54) Owner
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“I ordered a set of 17T turbos from Griffin Built, and my car is a beast now! Customer service was amazing, and shipping was fast.”
— David L., BMW 135i (N54) Owner
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“I upgraded to the B58 4.5” downpipe, and the exhaust note is perfect. The turbo spools quicker, and my car feels more responsive. 10/10!”
— Chris S., Toyota Supra A90 Owner
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“Upgraded my N54 to port injection, and Griffin Built made it super easy. The tune was spot on, and the car runs flawlessly on E85. Can’t recommend them enough!”
— Luis H., 2010 BMW 135i Owner
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“Customer service is unmatched. I had a ton of questions about my B58 hybrid turbo upgrade, and Isaiah walked me through everything. The car is an absolute beast now!”
— Ryan D., 2019 BMW M340i Owner
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“The tuning package was worth every dollar. Unlimited revisions, ghost cam, and flame tunes all included. The best part? 24/7 support. I’d never go anywhere else for tuning!”
— Anthony S., 2011 BMW 135i (N55) Owner
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“I was skeptical at first about remote tuning, but Griffin Built Racing made it seamless. My B58 Supra pulls way harder, and the throttle response is instant. The 4.5” downpipe + tune combo is a game-changer!”
— Kevin R., 2021 Toyota Supra A90 Owner
️️️️️ – “The Real Deal, No Matter the Age”
“At first, I wasn’t sure about getting tuned by someone so young, but Isaiah knows his stuff. He walked me through every step, answered all my questions, and my N54 runs better than ever. Don’t let his age fool you—he’s a real professional who puts in the work!”
— Marcus T., 2009 BMW 335i (N54) Owner
️️️️️ – “Legit Military Precision”
“Coming from the military myself, I respect hard work and dedication, and that’s exactly what Isaiah delivers. His tuning support is 24/7—he doesn’t leave you hanging. My B58 is running stronger than ever, and I couldn’t ask for a better tuner.”
— Chris D., 2020 Toyota Supra (B58) Owner, Army Veteran
️️️️️ – “Tuned By a Marine – No BS, Just Results”
“I saw that Isaiah was a Marine veteran, and I knew he was about business. He tuned my 340i, and I’ve never had such fast response times and precise adjustments. He’s building something special with Griffin Built Racing, and I’m here for it!”
— Alex G., 2018 BMW 340i (B58) Owner, Former Marine
️️️️️ – “Young, but Built Different”
“I respect Isaiah for what he’s doing—22 years old, but he’s already killing the tuning game. He’s got real knowledge, and his customer service is next level. He even helped me diagnose an issue that wasn’t tune-related. Griffin Built is the future!”
— Jordan R., 2011 BMW 335is (N54) Owner
️️️️️ – “Built a Connection, Not Just a Tune”
“Most tuners just take your money and send you a file, but Isaiah actually cares about his customers. He helped me dial in my flex-fuel setup and even checked in to see how my car was running weeks later. You don’t get that kind of service anywhere else.”
— Luis M., 2013 BMW 135i (N55) Owner
️️️️️ – “Trust the Process”
“I was skeptical at first, but once I started talking with Isaiah, I knew I made the right choice. He’s not just about making power—he makes sure your car is running safely and efficiently. Now, my N54 is pushing over 600hp, and it’s never felt better!”
— Michael S., 2008 BMW 335i (N54) Owner
️️️️️ – “From Military Discipline to Tuning Mastery”
“Isaiah’s attention to detail is on another level. You can tell he approaches tuning with the same discipline and focus that comes from being in the military. My car pulls like a freight train now, and the experience was top-tier.”
— Nathan P., 2017 BMW M240i (B58) Owner, Air Force Veteran