Make Sure Your Vehicle Performs at Its Best

Count on us when you need diesel repair services in Port Byron, IL

When your vehicle was first manufactured, it was made with all its different parts tuned and in sync with each other. As you upgrade or modify your vehicle, those parts are no longer calibrated. That's why you need diesel performance services from Larssen's Diesel Performance & Repair.

Call 563-424-5701 now to request our diesel repair or performance services in Port Byron, IL.

Dyno Services

Fine-tune your engine to ensure more efficiency.

Dyno Services

Machine Shop

Get the repairs and upgrades you need.

Machine Shop

Diesel Repair

Fix your diesel engine with ease.

Diesel Repair

Diesel Performance

Upgrade your engine for more power.

Diesel Performance

Make sure all your gears are aligned and your engine is tuned

Has your engine been making a funny sound? Bring it to our custom tuning shop. We can perform any upgrades, modifications and calibrations you need. Our full services include:

  • Dyno tuning
  • Diesel engine repair
  • Diesel repairs
  • Diesel performance upgrades
  • Truck fabrication


Come to our custom tuning shop in Port Byron, IL today to upgrade your vehicle.

What makes Larssen's Diesel Performance & Repair right for you?

After 12 years in business, we know all the ins and outs of engine repair and upgrades. You can expect exemplary service from our shop. Our diesel repair and performance services are available throughout Port Byron, IL and the Quad Cities, including Bettendorf, Davenport, LeClaire and Princeton, IA, as well as the surrounding areas.

Do you have a commercial fleet of diesel vehicles that you want upgraded or repaired? We can take care of everything.