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Ryan's Diesel Service
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        • 94-02 5.9L
        • 03-07 5.9L
        • 07.5-18 6.7L
        • 19-24 6.7L
      • Ford Powerstroke
        • 99.5-03 7.3L
        • 03-07 6.0L
        • 11-14 6.7L
        • 15-19 6.7L
        • 20-22 6.7L
        • 23-25 6.7L
      • Chevy/GMC Duramax
        • 01-04 LB7
        • 04.5-05 LLY
        • 06-07 LBZ
        • 07.5-10 LMM
        • 11-16 LML
        • 17-23 L5P
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    • S400 Turbocharger
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      • 01-04 LB7
      • 04.5-05 LLY
      • 06-07 LBZ
      • 07.5-10 LMM
      • 11-16 LML
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Diesel Performance Shop in Lake Mills, WI | Ryan’s Diesel Service

Maintaining your diesel engine's performance can often feel daunting, especially with so many options available. Residents of Lake Mills, WI, need a reliable partner who can ensure their vehicles run at their best. At Ryan's Diesel, we utilize advanced diagnostic techniques to identify issues swiftly and accurately. Our commitment to using high-quality components paired with expert performance tuning means you can trust that your vehicle will not only be fixed but optimized for longevity and efficiency. With our wealth of experience and dedication to quality, we aim to be that dependable resource for every member of the Lake Mills community looking to elevate their diesel performance.

High End Diesel Products Is Our Specialty

Ryan’s Diesel Service is no stranger when it comes to the manufacturing of high-end diesel products.

Learn more about us HERE

Warranties on Our Turbos

Outlined on product pages and HERE

All Turbos Are Manufactured in House

We believe all products should be manufactured in-house to maintain high levels of quality control.

Our Customers Love Us

Over 100 Reviews on google with a 5 star rating. View HERE

High End Machining

We currently have a HAAS VF4 5-axis machining center which runs a fair majority of our products. We also have a HAAS TL-1 lathe.

Turbo balancing is all done in-house on either our West Coast Balancer WCB30 or CWT industries balancer.

Diesel Performance Shop in Wisconsin | Ryan’s Diesel Service

If you’re searching for a diesel performance shop in Wisconsin, Ryan’s Diesel Service is your trusted destination for power, reliability, and expert upgrades. We specialize in building and enhancing diesel trucks for maximum horsepower, torque, and drivability.Whether you want better towing performance, improved fuel efficiency, or a full performance build, Ryan’s has the experience and equipment to get it done right.

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Why Choose Ryan’s Diesel Service?

As a locally owned business in Lake Mills, Ryan's Diesel understands the unique needs of our community and the importance of reliable performance for your heavy-duty vehicles. With over a decade of hands-on experience and specialized training, our team is equipped with the expertise to handle everything from routine maintenance to complex repairs. Utilizing advanced diagnostic techniques, we can pinpoint issues with precision, ensuring you're back on the road faster. We exclusively use high-quality components that meet or exceed OEM standards, providing peace of mind with our two-year warranty on parts and labor. Our performance tuning services not only enhance efficiency but also provide a competitive edge in tough conditions. At Ryan’s Diesel, your success is paramount; we strive to deliver exceptional service and support tailored to your individual needs, ensuring you receive the attention and care every customer deserves.

Upgrade Your Diesel Truck Today

Ready to take your truck to the next level? Whether you need custom tuning, turbo upgrades, or a full performance build, Ryan’s Diesel Service has you covered.

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Shop By Category

  • Shop All
  • Drop in Turbos
    • Cab & Chassis Turbocharger
    • Dodge Cummins
      • 94-02 5.9L
      • 03-07 5.9L
      • 07.5-18 6.7L
      • 19-24 6.7L
    • Ford Powerstroke
      • 99.5-03 7.3L
      • 03-07 6.0L
      • 11-14 6.7L
      • 15-19 6.7L
      • 20-22 6.7L
      • 23-25 6.7L
    • Chevy/GMC Duramax
      • 01-04 LB7
      • 04.5-05 LLY
      • 06-07 LBZ
      • 07.5-10 LMM
      • 11-16 LML
      • 17-23 L5P
  • Air Intake
  • Exhaust Components
  • Lift Pump
  • Transmission
  • S400 Turbocharger
  • Fuel Systems
    • 01-04 LB7
    • 04.5-05 LLY
    • 06-07 LBZ
    • 07.5-10 LMM
    • 11-16 LML
Ryan's Diesel Service

W356S8950 Godfrey Lane
Eagle, WI 53119

Call us at 262-844-9990

sales@ryansdieselservice.com

“Rates from 0–36% APR. Payment options through Affirm are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lenders Law license. For licenses and disclosures, see affirm.com/licenses. For example, a $800 purchase could be split into 12 monthly payments of $72.21 at 15% APR or 4 interest free payments of $200 every 2 weeks.”

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  • Drop in Turbos
  • Dodge Cummins
  • Ford Powerstroke
  • Chevy/GMC Duramax
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  • Exhaust Components
  • Lift Pump
  • Transmission
  • S400 Turbocharger
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