HOURS 8:00am - 5:00pm | Ohio - Eastern Time    Call: (740) 297-7223
  • Welcome to
    D&J Precision Machine

    Leading Innovation in the Diesel Performance Industry.

  • Welcome to D&J Precision Machine

    Welcome to D&J Precision Machine

    Leading Innovation in the Diesel Performance Industry.

Featured Catalog

New Products

New Products

Crate Engines

Crate Engines

Cylinder Heads

Cylinder Heads

Custom Pistons

Custom Pistons

Billet Rods

Billet Rods

Apparel

Apparel

Services

Repairs & Maintenance

Repairs & Maintenance

Our 12,000sq/ft service shop is capable of everything from oil changes to turn key 1200+hp custom builds.

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Custom Engine Builds

Custom Engine Builds

WE DO MORE THAN JUST CUMMINS PARTS! Yes, I know its hard to believe… Are you looking for a competition winning pulling tractor motor?

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Custom Engine Parts

Custom Engine Parts

Have your own product that needs production? We offer custom product design and engineering for specific application.

More Info

Product Branding

Product Branding

Are you a shop looking for your own line of products?

More Info

Repairs & Maintenance

Repairs & Maintenance

5,000sq/ft shop with two post lift. Capable of everything from oil changes to turn key 1000+hp custom builds.

More Info

Custom Engine Builds

Custom Engine Builds

WE DO MORE THAN JUST CUMMINS PARTS! Yes, I know its hard to believe… Need a competition winning pulling tractor motor?

More Info

Custom Engine Parts

Custom Engine Parts

Have your own product that needs production? We offer custom product design and engineering for specific application.

More Info

Product Branding

Product Branding

Are you a shop and want your own line of products?

More Info

Our Customers