Business Details
44 Years
experience
Expert Auto Repair & Maintenance Services in McHenry, IL
Since 1982, Performance Unlimited has been a family-owned and operated auto repair service dedicated to providing exceptional automotive care for both everyday drivers and performance enthusiasts. Our ASE-certified technicians combine over three decades of experience with ongoing training to ensure expertise across all makes and models, foreign and domestic. We specialize in maintaining the highest standards of safety, reliability, and cost-effectiveness for regular vehicle owners while offering advanced performance solutions for racers and classic car enthusiasts. Our commitment to quality includes state-of-the-art diagnostic equipment, a 24-month/24,000-mile warranty on all services, and a free 24-point vehicle inspection with every visit.Located in Ringwood, Illinois, we serve the Greater McHenry area with convenient drop-off and pick-up services within 10 miles of our shop. As an authorized AirLift dealer, we also provide load-leveling solutions and performance parts. Our green initiative focuses on recycling waste fluids, batteries, and metal while regenerating waste oil for shop heating. We pride ourselves on transparency, continuing education, and maintaining the trust of our loyal customer base through personalized service and technical excellence.
Services
Oil Changes
Brake Repair
Suspension Services
Performance Upgrades
Fleet Maintenance
Diagnostic Testing
Transmission Repair
Tire Services
Emissions Testing
Custom Fabrication
Details
- Year established: 1982
Highlights and features
- Family-owned with 40+ years of combined technician experience
- ASE Certified Technicians with ongoing industry training
- 24-month/24,000-mile warranty on all services
- Free 24-point vehicle inspection with every visit
- Specialized performance solutions for racing and classic vehicles
Associations and certifications
- ASE
Services
Oil Changes
Regular oil changes maintain engine longevity and performance. Our technicians use high-quality lubricants and follow manufacturer specifications for all vehicle types. Includes filter replacement and fluid level checks.
Brake Repair
Comprehensive brake services from pad replacement to rotor resurfacing. We diagnose wear patterns and ensure optimal stopping power using specialized tools for foreign and domestic vehicles.
Suspension Services
Suspension diagnostics and repairs improve ride comfort and handling. Services include shock/strut replacement, alignment, and steering component inspections using advanced equipment for performance and daily drivers.
Performance Upgrades
Custom performance modifications for street and track vehicles. Offers engine tuning, exhaust systems, and aerodynamic enhancements tailored to racing categories like drag, circle track, and off-road.
Fleet Maintenance
Scheduled maintenance programs for business fleets reduce downtime. Services include preventive care, compliance inspections, and volume pricing for municipal, postal, and construction industry vehicles.
People
Denny
Owner
Denny has led Performance Unlimited since 1982, earning Chamber of Commerce awards for community involvement. He oversees operations and ensures technical excellence through continuous training programs for staff.
Questions
What services do you offer for classic cars?
We provide restoration, maintenance, and performance upgrades for classic vehicles including specialized diagnostics and fabrication services.
Do you offer fleet vehicle maintenance?
Yes, we service commercial fleets with scheduled maintenance, compliance checks, and emergency repairs for businesses in transportation and construction industries.
Are your technicians certified?
All technicians are ASE-certified with ongoing training in current automotive technologies and repair methods for all vehicle types.
What payment options are available?
We offer 6-month financing options through special promotions and accept major credit cards for all services.
Do you provide pickup and drop-off services?
Yes, we offer complimentary transportation within 10 miles of our Ringwood location for customer convenience.
Reviews (4)
Bill Lundeberg
May 08, 2022
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Had an oil leak in my Mercury. Not only did Denny and his crew find and fix the leak, they were able to squeeze me in at the last minute. While fixing the leak, they also changed my spark plugs, potentially saving hundreds in labor Down the line. The cost, incidentally, was very reasonable. Just a joy to do business with. Highly recommended.
The Great Awakening
Apr 15, 2022
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I have only spoken to the owner. He was very nice and more than accommodating as he allowed me to provide the parts and he just provides the labor. My first appointment here is Tues. I will update this further once I have services done there.
Jerry Filippone
Apr 06, 2022
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I highly recommend Performance Unlimited for any automotive needs. The business is well run and operated by owner Denny Norton. His staff are certified well trained mechanics that are truly knowledgeable. It is appreciated that work to be done is detailed and courteously explained. Pricing is reasonable and honest without hidden fees. Again, highly recommended.
Leilani Nett
Dec 21, 2021
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We trust all 4 of our vehicles with Denny and his truly amazing team! Can't comment enough about the amazing quality of work and excellent service! We're so thankful to have discovered this gem for auto repair and maintenance! Services: General repairs & maintenance, Oil change
