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D&J Precision Machine Brand

56 products

D&J Precision Machine isn’t just a name—it’s a promise. A promise of excellence, a commitment to innovation, and a partnership in performance. Join us as we power forward into the future.

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D&J Precision | 2003-2005 Dodge Ram Cummins Billet Valve Cover D&J Precision | 2003-2005 Dodge Ram Cummins Billet Valve Cover
$868.00
$868.00
We designed this Cummins billet valve cover in house for the best balance of fit, finish, and functionality, while keeping your budget in mind.   These valve covers are made from aircraft quality 6...
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D&J Precision | 24V Cummins 115LB Valve Springs
$556.00
$556.00
Our HD 115lb 24v Cummins Valve Springs have been proven with years of testing. We have seen over 120psi of boost on one of our Stage 3 cylinder heads with these springs. These are the same valve sp...
D&J Precision | 0.500
$172.00
$172.00
0.500″ Taller Billet 5.9 Cummins Grid Heater Delete suited for 1998.5-2007 Dodge 5.9L Cummins Diesel. Extra clearance Billet aluminum Get more airflow into your engine and avoid boost leaks. ...
D&J Precision | 2003+ Cummins Billet Rear Freeze Plug
$120.00
$120.00
The Cummins common rail ’03-to-current billet rear freeze plug takes care of the common issues of high coolant pressure. It bolts in the back of the block.  
D&J Precision | 2006-2018 Dodge Ram Cummins Black Powder Coat Billet Valve Cover
$1,047.00
$1,047.00
We designed the Billet Valve Cover in-house for the best balance of fit, finish, and functionality, while keeping your budget in mind.   These valve covers are made from aircraft quality 6061-T6 al...
D&J Precision | Cummins Billet Front Freeze Plug
$79.00
$79.00
Introducing our newly designed Cummins Billet Front Freeze Plug that does not leak! Our billet front freeze plug is designed to be held in by a factory fan support. Included: 1 Front Billet Fre...