About SPR Engines in Wisconsin.

Specializing in Domestic, Import, Marine, and Light & Medium Duty Industrial Vehicles

When it comes to custom performance racing and diesel engine building, Speed Performance Engines (SPR) is your local, full service expert. SPR has been in business for over 21 years. We have been building and repairing performance and racing engines for a variety of vehicles in our shop in Port Washington, Wisconsin since 2002. We are a full service automotive machine shop specializing in import, domestic, marine, light & medium duty industrial engines. We deliver quick turnaround times, and offer in-house engine dyno testing, flow bench testing and balancing.

  • Full-Service Automotive Machine Shop with Quick Turnaround
  • In-House Dyno Testing
  • Stock Rebuilt Short & Long Blocks
  • Cylinder Head Machining
  • Block Machining
  • Engine Balancing
  • Component Testing
  • Performance Assembly
  • Parts Supply

Over 20 yrs of Experience