What are the opening hours?

Monday 9am - 5pm Tuesday 9am - 5pm Wednesday 9am - 5pm Thursday 9am - 5pm Friday 9am - 4pm

Quantum Performance

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United States
Fredonia, WI
Quantum Performance

At Quantum Performance, we specialize in many different High Performance and Race oriented services. See the Shop Services section for more information.
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Quantum Performance strives to provide automotive performance enthusiasts in the Wisconsin area with the highest quality vehicle services available. Quantum Performance provides many unique services, ranging from advanced racing level services, to specialty sourced or built performance parts, to completely built project vehicles. At Quantum Performance, we use our advanced training, realtime exper

ience, and passionate attention to detail to ensure our customers recieve a truly high quality product. Asian Vehicles Serviced: Nissan/Infinitit, Subaru, Toyota/Lexus/Scion, Mazda, Mitsubishi, Hyundai. European Vehicles Serviced: Audi/Volkswagen, Porsche, BMW. Full Service Maintenance

Race level maintenance utilizing high performance products. Full vehicle safety inspections performed by ASE certified technicians. Advanced diagnostics. Factory level maintenance using factory recommended procedures and products
Performance Parts Installation

Experienced advice on correct part selection. Performance goal oriented personalized planning and guidance. Professional installations and adjustments. Chassis Adjustments

Custom suspension system adjustments
Corner balancing
Harness bar setup and adjustment
Race seat installations
Track Day Preparation and Support

Pre-race safety and performance inspections. On site track day support upon request.

06/01/2026

Lots of clean GD’s lately. This one is overbuilt and under run, making 400whp on 93 octane. Tuned in house via , engine via , and turbo via .

04/20/2026

Office/Shop Assistant

We are seeking a dynamic and organized Office/Shop Assistant to join our team! This role offers an exciting opportunity to be the first point of contact for visitors and clients, manage administrative tasks efficiently, and support daily operations across our office and shop environment. The ideal candidate will bring enthusiasm, excellent communication skills, have automotive knowledge and passion and a proactive approach to ensure smooth and professional service delivery

Responsibilities
• Greet visitors, clients, and vendors warmly, providing exceptional customer service at the front desk
• Cleaning of vehicle parts and shop space
• Assisting technicians with mechanical jobs
• Manage phone, answer inquiries promptly, and direct calls accurately using professional phone etiquette
• Handle data entry, filing, and document proofreading to maintain organized records and ensure accuracy
• Assist with office management tasks such as calendar management, scheduling appointments, and coordinating meetings
• Maintain office supplies inventory, order necessary materials, and ensure the workspace remains tidy and functional
• Provide administrative support including typing correspondence, managing emails and supporting customers.

04/08/2026

Super clean 2005 STI came in for new suspension goodies, brakes, a health check and tuning. This is a great baseline for where these cars should be on pump gas with the stock turbo on our dyno. We love keeping these on the road!

03/30/2026

Built in-house: custom engine harness for Porsche 964 with ITBs and twin plug COP ignition conversion, tailored to Nexus R3. Expanding our Haltech applications for comprehensive wiring and tuning support with our builds.

02/22/2026

Still our favorite clutch for the Subaru EJ’s. The ACT twin disc has yet to leave a frown. Just one more thing you don’t get to see after a build is buttoned up, yet it definitely doesn’t go unappreciated!

02/13/2026

Custom nitrous control system for the Dodge boys, tailored around the 3rd Gen Challenger chassis. Finished up and off to Florida to our buds .

12/18/2025

Custom built Haltech PD16 harness finished up and some potted sensors for Impreza RS build. The PDM will be running the fuel system and accusump, and will be powering up multiple controllers and body items.

12/11/2025

No PRI for us this year, has us all feeling… Blue…

12/03/2025

A little late but here’s few photos of the Nissans we support, from the last Champcar endurance race at Road America this fall. Another first place for the Two Brothers 350z, a 3rd place for the JSK Altima, and some great testing and improvement on the VQ powered PBR 240sx.

10/24/2025

We’ve been dabbling a bit more in Mopars lately, mostly the boosted variants! Helping this one work out some of the bugs from their swap. There’s just something about that supercharger scream on these Hemi’s!

Address

288 Meadowlark Road
Fredonia, WI
53021

Opening Hours

Monday	9am - 5pm
Tuesday	9am - 5pm
Wednesday	9am - 5pm
Thursday	9am - 5pm
Friday	9am - 4pm

Telephone

+12628252760

Website

http://www.quantum-performance.com/, https://quantum-performance-llc.square.site/

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