Welcome to Performance Unlimited, Inc.

For more than 30 years, Performance Unlimited, a family owned and operated auto repair service, has kept family cars on the road, while also keeping racers in the winner’s circle and classic restorations rolling. From basic maintenance to complex repairs, we have the expertise to make auto ownership safe, reliable and cost effective. Our expert auto-repair technicians are certified and combine extensive and ongoing training with a vast level of experience working with all makes and models – foreign and domestic.

Classic and performance racers and enthusiasts also turn to Performance Unlimited with confidence knowing that we will help them to achieve that winning edge – whether competing on the track, at a car show or for the hearts of car lovers on the road.

Whatever your automotive goals – reliability, financially efficient operation and/or speed and handling – Performance Unlimited offers unlimited performance.

Distinctive Auto Service and Truck Repair
Truck and High Performance Accessories

We Install Remote Starter Systems - Get Started
FOR THAT SPECIAL FRIEND - Gift Cards Available
Kiwanis Soap Box Derby Sponsor - Check out our Car.

Our Best Values Are:
  • We drop you off and pick you up so you don't miss important business and family appointments (within 10 miles of our shop located just north of McHenry - Click here for Map and Direction)
  • Family Owned and operated - so we understand what it means when your car or truck fails
  • ASE Certified Technicians - We proudly display our certificates
  • 24,000 mile / 24 month warranty on all provided services
  • Constant Continuing Education means we never fall behind new technologies
  • 24 Point Vehicle Inspection - Ask for one. It’s FREE

Summer Special:
AC Performance Check - $29.95 (50% off Regular price)
  • Inspect hoses, lines, seals, connections and other components for leaks.
  • Check temperature readings
  • Check that your compressor and clutch is operating properly and inspect the drive belt for cracks or damage.

The air conditioning belt drives many other components in your vehicle, meaning a worn belt can have a much worse impact than simply an uncomfortable trip. It takes an expert to tell, so bring your car to us and let our ASCE experts give you the peace of mind knowing that your vehicle will keep you cooler and safer this summer.



($20 value)
($40 value)
*with non-discounted Oil Change

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