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D&J Precision Machine Brand

54 products
D&J Precision Machine • Diesel Performance Machining & Manufacturing The EXECUTIONER - D&J Precision Machine Featured Catalog New Products Crate Engines Cylinder Heads Custom Pistons Billet Rods Apparel Services D&J HP Reman Engines!
Regular Price $579.99
Sale Price $579.99
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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...
Regular Price $439.99
Sale Price From $439.99
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Our Cummins Billet Timing cover is machined in-house from 6061 aluminum. It is designed to use factory fan with stock dampener and belt without modification. Our Cummins billet timing cover kits co...
Regular Price $574.99
Sale Price $574.99
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Billet Air Shut Off Guillotine for sled pulling applications. Dual internal spring design utilizing a 1/4in thick aluminum blade. Includes set screw or weld-on flange and genuine Cummins v-band. In...
Regular Price $369.99
Sale Price $369.99
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Use only the best with our D&J Cummins Head Gasket kit 2007.5-2018 6.7 Includes genuine Cummins head gasket, exhaust manifold gaskets, long intake gasket air horn gasket, injector install kit w...
Regular Price $2,099.99
Sale Price $2,099.99
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Our 24v Performance Cummins Reman Head has all the necessary upgrades to make your head durable and reliable.  We have fixed all the common issues these heads have.  One of the most common prob...
Regular Price $699.99
Sale Price $699.99
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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...