Magnum Automotive Ltd

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About Magnum Automotive Ltd

Magnum Automotive specialise in servicing and tuning of vehicles from the real glory days of the performance car era. When engines still had carburettors to supply the fuel and distributors to supply ignition.

John and Graeme Mincham have been working on all types of fossil burning machines from stock to full on race, for over 25 years, and have collected a wealth of engine design and tuning information along the way. With the addition of the Dyno machines (Engine and Rolling Road) this knowledge base has only escalated.

So if you want professional engine building, tuning and servicing for your American or Australian made vehicles, John and Graeme are set up to get you the results you desire.

What makes us different?

Our specialties include servicing and tuning performance vehicles. Are you looking for a professional engine building, tuning and servicing for your Australian or American made vehicle? Magnum Automotive will give you the results you require!

Business photos

741 Te Atatu Road Te Atatu Peninsula Auckland 0610


  • Motor Trade Association (Inc)

Products and services

  • Automotive and Motorsport Engine Services
  • Modifications
  • Tune-ups
  • Engine Repairs
  • Dyno Tuning
  • Chassis Dynamometer
  • Full Automotive and Motorsport Service
  • Maintenance
  • Custom Work
  • Vehicle Diagnostics
  • Engine Builds
  • Repairs
  • Automotive Mechanics
  • Mechanics
Vehicle Style
  • Performance
  • Muscle
  • Classic Cars
  • Family Owned & Operated
Service Options
  • Consultations

Mailing address

PO BOX 84-096 Westgate, Waitakere City 0657

In business since



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