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

    Leading Innovation in the Diesel Performance Industry, suiting your needs from street to speed.

  • Welcome to D&J Precision Machine

    Welcome to D&J Precision Machine

    Leading Innovation in the Diesel Performance Industry, suiting your needs from street to speed.

Featured Catalog

New Products

Crate Engines

Cylinder Heads

Custom Pistons

Billet Rods

Apparel

Services

D&J HP Reman Engines

D&J HP Reman Engines

Our Cummins HP Reman Long Blocks come fully assembled including oil pan and front timing cover, using the best products we have found with years of experience in the high-performance diesel Industry.

More Info

Custom Engine Builds

Custom Engine Builds

WE DO MORE THAN JUST CUMMINS PARTS! Yes, I know it’s hard to believe… Are you looking for 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 looking for your own line of products?

More Info

D&J HP Reman Engines

D&J HP Reman Engines

Our Cummins HP Reman Long Blocks come fully assembled including oil pan and front timing cover, using the best products we have found with years of experience in the high-performance diesel Industry.

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