4969 S Packard Ave

Cudahy , WI 53110

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High Performance Modifications

High-Performance Vehicle Modifications

Free Estimates | Over 40 Years of Experience | Family-Owned Business

Free Estimates

Over 40 Years of Experience

Family-Owned Business

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Personalize Your Car With Affordable Modifications

Don't let the cost of modifications keep you from modifying your car. With our affordable vehicle modifications, you'll be sure to have the car of your dreams. Call Authentic Automotive today to discuss your modification needs!


We have over 40 years of experience in the business. Our skilled auto body technicians and mechanical technicians will ensure that you get the best outcome for your money.

Variety of Auto Modification Services

  • Engine builds
  • Bolt-ons
  • Rear gear setups
  • High-performance shocks and springs
  • Struts
  • Exhaust
  • Ceramic brakes
  • Cold air intakes



Trust Authentic Automotive to increase the performance of your vehicle.

FREE Estimates

If you've been debating about modifying your ride, give us a call and we can estimate how much the modifications would cost.

Serving Southeast Wisconsin for Over 40 Years

Call us for a FREE estimate.

414-483-8850

414-483-8850
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"Was referred to Authentic Automotive by my mechanic friend and I cannot say enough good things about Jim's work, Kia made a small issue into a big problem and Jim was able to fix it with his years of experience."

- Russ Say

Learn More About

Authentic Automotive LLC

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