Quantum Performance is a trusted automotive shop that serves performance car enthusiasts in Wisconsin. The business offers a wide range of services, from advanced racing modifications to sourcing and building specialty performance parts. They also create fully built project vehicles for customers looking for high-quality, customized cars. The team at Quantum Performance is known for their knowledge, honesty, and helpful attitude. Customers appreciate their clear communication, quick responses, and attention to detail. Many reviews highlight how the staff takes time to answer questions, provide expert advice, and ensure the work meets high standards. They have experience with various vehicles, including Focus STs, WRXs, and Subarus, and have helped customers increase horsepower, improve drivability, and achieve reliable performance. Customers often mention the shop’s clean, temperature-controlled environment and their dedication to quality work. Whether installing custom wiring, tuning, or sourcing parts, Quantum Performance consistently delivers results that satisfy customers. Overall, they are regarded as an expert and reliable choice for those looking to enhance their vehicle’s performance with top-notch service and craftsmanship.
Everyone on this team is amazing. Its a positive atmosphere. I appreciate everyone's hard work, craftsmanship and dedication to go fast and still be reliable Aaron,Joni,Tyler and Tom thank you. Big shout out to Joni for always keeping me in the loop with progress and updates
July 2025
Very knowledgeable and helpful. Took time to answer a lot of questions I had. I’m the end he found me some extra ponies and it’s a lot more drivable too!
May 2025
Did an awesome job tuning my subi and letting me know what parts were needed for my build after I installed an IAG 550!
