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D&J Precision Machine Brand

57 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 | 24V Cummins 105LB Valve Springs
$325.99
$325.99
Our 105lb 24v Cummins Valve Springs have been proven with years of testing.  *Spring retainers not included.
D&J Precision | P-Pump Cummins Billet Tappet Cover With Dual Baffled Breather Setup
$419.98
$419.98
Upgrade your engine's appearance with our premium P-Pump Cummins billet tappet cover. Crafted from high-quality billet aluminum, this tappet cover is designed for durability and enhanced aesthetics...
$120.00 Off Sold Out
D&J Precision | 2003-2005 Dodge Ram 5.9L Cummins Custom LED Billet Valve Cover
$1,079.99
$1,079.99
$1,199.99
Custom LED Cummins Billet Valve Cover fits 2003-2005 Cummins. Unlike the other billet valve covers on the market we designed our Custom LED Cummins Billet Valve Cover with function first. We design...
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D&J Precision | 1989-1998 Dodge Ram 5.9L 12V Cummins Push Rods 7/16 .168 Wall
$314.99
$314.99
D&J builds their Cummins pushrods for 12V engines feature a 7/16 .168 wall tube for strength and rigidity. NOTE: Does NOT Fit 1998.5 24V Engines.
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D&J Precision | Billet Air Kill & Velocity Stack 5.5 Inch OD Cover
$799.99
$799.99
Billet Air Shut Off Guillotine with Velocity Stack for sled pulling applications. Dual internal spring design utilizing a 1/4 inch thick aluminum blade. It includes set screw or weld-on flange and ...
D&J Precision | Billet Stage 2 6.7L CR Cummins Intake Manifolds
$1,102.49
$1,102.49
The Billet Stage 2 Intake Manifold is designed for our Stage 2 cylinder heads. These intakes utilize the stock intake horn locations and fuel setups.  It comes with all the mounting hardware needed...