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12V 5.9 Cummins (89-97) Parts

If you have a 12V Cummins engine in your Dodge truck, you’re already familiar with the power and performance it’s capable of delivering. But there’s always a way to get a little bit more from it, which is why Powerhouse Diesel offers a wide selection of 12V Cummins parts to help you fine-tune it and keep it in good health. Whether you’re looking for 12V Cummins upgrades or just what you need for routine maintenance, you can trust our vast range of products to provide you with exactly what you want. Take a look at our 12 valve Cummins performance parts here on this page, then let us know if you have any questions:

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    Eaton ELocker4 Differential Dana 70 35 Spline 4.56 & Up Ratio

    Eaton
    $1,995.74
    $1,995.74 - $1,995.74
    $1,995.74
    $1,875.99
    $1,875.99 - $1,875.99
    $1,875.99

    The Eaton ELocker is an electronic, selectable differential designed for drivers that need traction on-demand. At the flip of a dash switch, driver...

    View full details
    $1,995.74
    $1,995.74 - $1,995.74
    $1,995.74
    $1,875.99
    $1,875.99 - $1,875.99
    $1,875.99
    Save 6% Save %
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    Eaton ELocker4 Differential Dana 60 Performance 35 Spline 4.56 & Up Ratio

    Eaton
    $1,584.03
    $1,584.03 - $1,584.03
    $1,584.03
    $1,488.99
    $1,488.99 - $1,488.99
    $1,488.99

    The Eaton ELocker is an electronic, selectable differential designed for drivers that need traction on-demand. At the flip of a dash switch, driver...

    View full details
    $1,584.03
    $1,584.03 - $1,584.03
    $1,584.03
    $1,488.99
    $1,488.99 - $1,488.99
    $1,488.99
    Save 6% Save %
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    Eaton ELocker4 Differential Dana 60 Performance 35 Spline 4.10 & Down Ratio

    Eaton
    $1,584.03
    $1,584.03 - $1,584.03
    $1,584.03
    $1,488.99
    $1,488.99 - $1,488.99
    $1,488.99

    The Eaton ELocker is an electronic, selectable differential designed for drivers that need traction on-demand. At the flip of a dash switch, driver...

    View full details
    $1,584.03
    $1,584.03 - $1,584.03
    $1,584.03
    $1,488.99
    $1,488.99 - $1,488.99
    $1,488.99
    Save 6% Save %
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    Eaton ELocker4 Differential Dana 60 30 Spline 4.56 & Up Ratio

    Eaton
    $1,776.58
    $1,776.58 - $1,776.58
    $1,776.58
    $1,669.99
    $1,669.99 - $1,669.99
    $1,669.99

    The Eaton ELocker is an electronic, selectable differential designed for drivers that need traction on-demand. At the flip of a dash switch, driver...

    View full details
    $1,776.58
    $1,776.58 - $1,776.58
    $1,776.58
    $1,669.99
    $1,669.99 - $1,669.99
    $1,669.99
    Save 6% Save %
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    Eaton ELocker4 Differential Dana 60 30 Spline 4.10 & Down Ratio

    Eaton
    $1,776.58
    $1,776.58 - $1,776.58
    $1,776.58
    $1,669.99
    $1,669.99 - $1,669.99
    $1,669.99

    The Eaton ELocker is an electronic, selectable differential designed for drivers that need traction on-demand. At the flip of a dash switch, driver...

    View full details
    $1,776.58
    $1,776.58 - $1,776.58
    $1,776.58
    $1,669.99
    $1,669.99 - $1,669.99
    $1,669.99
    Save 6% Save %
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    Eaton ELocker4 Differential Dana 44 Front 30 Spline 3.92 & Up Ratio

    Eaton
    $1,540.42
    $1,540.42 - $1,540.42
    $1,540.42
    $1,447.99
    $1,447.99 - $1,447.99
    $1,447.99

    The Eaton ELocker is an electronic, selectable differential designed for drivers that need traction on-demand. At the flip of a dash switch, driver...

    View full details
    $1,540.42
    $1,540.42 - $1,540.42
    $1,540.42
    $1,447.99
    $1,447.99 - $1,447.99
    $1,447.99
    Save 6% Save %
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    Eaton ELocker Service Kit Dana 60 35 Spline

    Eaton
    $312.49
    $312.49 - $312.49
    $312.49
    $299.99
    $299.99 - $299.99
    $299.99

    Eaton Elocker ® Service Kit; Dana 60; 35 Spline; Incl. Side Gear; Pinion Gears; Shims; Pinion Thrust Washers; Pinion Shafts; Shaft Lock Screw;This ...

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    $312.49
    $312.49 - $312.49
    $312.49
    $299.99
    $299.99 - $299.99
    $299.99
    Save 4% Save %
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    Eaton Detroit Truetrac Differential 35 Spline 1.50in Axle Shaft Diameter 4.56 & Up Ratio Dana 60HD

    Eaton
    $1,372.28
    $1,372.28 - $1,372.28
    $1,372.28
    $1,249.99
    $1,249.99 - $1,249.99
    $1,249.99

    The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Mainten...

    View full details
    $1,372.28
    $1,372.28 - $1,372.28
    $1,372.28
    $1,249.99
    $1,249.99 - $1,249.99
    $1,249.99
    Save 9% Save %
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    Eaton Detroit Truetrac Differential 35 Spline 1.50in Axle Shaft Diameter 4.10 & Down Ratio Dana 60HD

    Eaton
    $940.20
    $940.20 - $940.20
    $940.20
    $864.99
    $864.99 - $864.99
    $864.99

    The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Mainten...

    View full details
    $940.20
    $940.20 - $940.20
    $940.20
    $864.99
    $864.99 - $864.99
    $864.99
    Save 8% Save %
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    Eaton Detroit Truetrac Differential 31 Spline 1.32in Axle Shaft Diameter 2.76-4.56 Ratio

    Eaton
    $891.29
    $891.29 - $891.29
    $891.29
    $819.99
    $819.99 - $819.99
    $819.99

    The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Mainten...

    View full details
    $891.29
    $891.29 - $891.29
    $891.29
    $819.99
    $819.99 - $819.99
    $819.99
    Save 8% Save %
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    Eaton Detroit Truetrac Differential 35 Spline 1.50in Axle Shaft Dia 4.10 & Up Ratio Rear Dana 80

    Eaton
    $1,135.86
    $1,135.86 - $1,135.86
    $1,135.86
    $1,044.99
    $1,044.99 - $1,044.99
    $1,044.99

    The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Mainten...

    View full details
    $1,135.86
    $1,135.86 - $1,135.86
    $1,135.86
    $1,044.99
    $1,044.99 - $1,044.99
    $1,044.99
    Save 8% Save %
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    Eaton Detroit Truetrac Differential 30 Spline 1.31in Axle Shaft Dia 4.56 & Up Ratio Rear Dana 60

    Eaton
    $1,372.28
    $1,372.28 - $1,372.28
    $1,372.28
    $1,249.99
    $1,249.99 - $1,249.99
    $1,249.99

    The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Mainten...

    View full details
    $1,372.28
    $1,372.28 - $1,372.28
    $1,372.28
    $1,249.99
    $1,249.99 - $1,249.99
    $1,249.99
    Save 9% Save %
  • responsive-image responsive-image Save 8% Save %

    Eaton Detroit Truetrac Differential 30 Spline 1.31in Axle Shaft Dia 4.10 & Down Ratio Rear Dana 60

    Eaton
    $1,358.69
    $1,358.69 - $1,358.69
    $1,358.69
    $1,249.99
    $1,249.99 - $1,249.99
    $1,249.99

    The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Mainten...

    View full details
    $1,358.69
    $1,358.69 - $1,358.69
    $1,358.69
    $1,249.99
    $1,249.99 - $1,249.99
    $1,249.99
    Save 8% Save %
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    Eaton Detroit Truetrac Differential 30 Spline 1.31in Axle Shaft Dia 3.92 & Up Ratio Front Dana 44

    Eaton
    $777.25
    $777.25 - $777.25
    $777.25
    $707.99
    $707.99 - $707.99
    $707.99

    The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Mainten...

    View full details
    $777.25
    $777.25 - $777.25
    $777.25
    $707.99
    $707.99 - $707.99
    $707.99
    Save 9% Save %
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    Eaton Detroit Truetrac Differential 29 Spline 1.21in Axle Shaft Dia 2.73 & Up Ratio Rear 8.375in

    Eaton
    $1,014.12
    $1,014.12 - $1,014.12
    $1,014.12
    $932.99
    $932.99 - $932.99
    $932.99

    The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Mainten...

    View full details
    $1,014.12
    $1,014.12 - $1,014.12
    $1,014.12
    $932.99
    $932.99 - $932.99
    $932.99
    Save 8% Save %
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    Eaton Detroit Locker Differential 35 Spline 1.50in Axle Shaft Diameter 4.56 & Up Ratio Dana 60HD

    Eaton
    $1,079.34
    $1,079.34 - $1,079.34
    $1,079.34
    $992.99
    $992.99 - $992.99
    $992.99

    The Detroit Locker is a 100% automatic locking differential that provides ultimate traction for mild to extreme vehicle applications. Its unique, b...

    View full details
    $1,079.34
    $1,079.34 - $1,079.34
    $1,079.34
    $992.99
    $992.99 - $992.99
    $992.99
    Save 8% Save %
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    Eaton Detroit Locker Differential 35 Spline 1.50in Axle Shaft Diameter 4.10 & Down Ratio Dana 60HD

    Eaton
    $1,079.34
    $1,079.34 - $1,079.34
    $1,079.34
    $992.99
    $992.99 - $992.99
    $992.99

    The Detroit Locker is a 100% automatic locking differential that provides ultimate traction for mild to extreme vehicle applications. Its unique, b...

    View full details
    $1,079.34
    $1,079.34 - $1,079.34
    $1,079.34
    $992.99
    $992.99 - $992.99
    $992.99
    Save 8% Save %
  • responsive-image responsive-image Save 8% Save %

    Eaton Detroit Locker Differential 32 Spline 1.41in Axle Shaft Dia 4.10 & Down Ratio Rear Dana 70

    Eaton
    $1,327.17
    $1,327.17 - $1,327.17
    $1,327.17
    $1,220.99
    $1,220.99 - $1,220.99
    $1,220.99

    The Detroit Locker is a 100% automatic locking differential that provides ultimate traction for mild to extreme vehicle applications. Its unique, b...

    View full details
    $1,327.17
    $1,327.17 - $1,327.17
    $1,327.17
    $1,220.99
    $1,220.99 - $1,220.99
    $1,220.99
    Save 8% Save %
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    Eaton Detroit Locker Differential 31 Spline 1.32in Axle Shaft Diameter 2.76-4.56 Ratio Rear 9.25in

    Eaton
    $1,246.72
    $1,246.72 - $1,246.72
    $1,246.72
    $1,146.99
    $1,146.99 - $1,146.99
    $1,146.99

    The Detroit Locker is a 100% automatic locking differential that provides ultimate traction for mild to extreme vehicle applications. Its unique, b...

    View full details
    $1,246.72
    $1,246.72 - $1,246.72
    $1,246.72
    $1,146.99
    $1,146.99 - $1,146.99
    $1,146.99
    Save 8% Save %
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    Eaton Detroit Locker Differential 30 Spline 1.31in Axle Shaft Dia 4.10 & Down Ratio Rear Dana 60/61

    Eaton
    $1,382.60
    $1,382.60 - $1,382.60
    $1,382.60
    $1,271.99
    $1,271.99 - $1,271.99
    $1,271.99

    The Detroit Locker is a 100% automatic locking differential that provides ultimate traction for mild to extreme vehicle applications. Its unique, b...

    View full details
    $1,382.60
    $1,382.60 - $1,382.60
    $1,382.60
    $1,271.99
    $1,271.99 - $1,271.99
    $1,271.99
    Save 8% Save %
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    Eaton Detroit Locker Differential 29 Spline 1.21in Axle Shaft Diameter 2.73 & Up Ratio

    Eaton
    $1,246.72
    $1,246.72 - $1,246.72
    $1,246.72
    $1,146.99
    $1,146.99 - $1,146.99
    $1,146.99

    The Detroit Locker is a 100% automatic locking differential that provides ultimate traction for mild to extreme vehicle applications. Its unique, b...

    View full details
    $1,246.72
    $1,246.72 - $1,246.72
    $1,246.72
    $1,146.99
    $1,146.99 - $1,146.99
    $1,146.99
    Save 8% Save %
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    Eaton Dana 70 U Rear Master Install Kit

    Eaton
    $281.44
    $281.44 - $281.44
    $281.44
    $241.99
    $241.99 - $241.99
    $241.99

    Eaton master installation kits make upgrading your differential easier by providing all the components needed to properly install your Eaton differ...

    View full details
    $281.44
    $281.44 - $281.44
    $281.44
    $241.99
    $241.99 - $241.99
    $241.99
    Save 14% Save %
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    Eaton Detroit Locker Diff 30 Spline 1.31in Axle Shaft Dia 3.92 & Up Ratio Front/Reverse Rear Dana 44

    Eaton
    $1,048.91
    $1,048.91 - $1,048.91
    $1,048.91
    $964.99
    $964.99 - $964.99
    $964.99

    The Detroit Locker is a 100% automatic locking differential that provides ultimate traction for mild to extreme vehicle applications. Its unique, b...

    View full details
    $1,048.91
    $1,048.91 - $1,048.91
    $1,048.91
    $964.99
    $964.99 - $964.99
    $964.99
    Save 8% Save %
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    Eaton Dana 60 Front/Rear Master Install Kit

    Eaton
    $263.47
    $263.47 - $263.47
    $263.47
    $225.99
    $225.99 - $225.99
    $225.99

    Eaton master installation kits make upgrading your differential easier by providing all the components needed to properly install your Eaton differ...

    View full details
    $263.47
    $263.47 - $263.47
    $263.47
    $225.99
    $225.99 - $225.99
    $225.99
    Save 14% Save %

The Best 12V Cummins Performance Parts for Your Truck

When it comes to getting more out of your engine, having the right parts and products matter a lot. Fortunately, Powerhouse Diesel offers a huge inventory of offerings from many of the top names in the industry. From fuel filters and gaskets to transmissions and turbochargers, we’re your complete source for everything to boost what your engine is capable of delivering. We carry parts from leading brands including industrial injection, Smeding and fleece performance.

But it’s more than our extensive range of products that makes us the best place to shop. We understand that trying to sort through your options can be confusing at times, but our team of qualified experts has all the knowledge and expertise needed to help you narrow down your search. We can point you in the right direction and help you find the product that’s perfect for what you want. 

If you want to learn more about all the various 12V Cummins parts and accessories we have to offer, browse through our selection on this page or reach out to speak with an experienced member of our team today. 

Shop 12V Cummins Parts by Category

Browse parts for your 1989-1998 Dodge Ram 5.9L 12-valve Cummins by system below.

12V Cummins Fuel System & Injectors

Pump governor spring kits, delivery valves, fuel filters, and performance 
upgrades - plus 12V Cummins fuel injectors for stock replacement and 
high-power builds. Shop all 12V Cummins fuel system parts.

12V Cummins Engine Internals

Rod bearings, head studs, valve cover gaskets, and rebuild components 
from trusted suppliers. Browse 12V Cummins engine parts.

12V Cummins Intake & Cooling

Cold-air intakes, coolant filters, and intercooler upgrades to lower 
intake temps and protect your cooling system. Browse 12V Cummins 
intakes and cooling.

12V Cummins Transmissions

Rebuild kits, shift kits, and short tailshaft options for the NV4500 
and Getrag transmissions. Browse 12V Cummins transmissions.

12V Cummins Tuning

Tuning options for the 12-valve - from P-pump mechanical modifications 
to electronic tuning accessories. Browse 12V Cummins tuning.

12V Cummins Performance Packages

Bundled upgrade kits for specific horsepower targets - from daily 
driving to competition pulling. Browse 12V Cummins performance packages.

 

12V Cummins FAQs

  • The 12-valve 5.9L Cummins was produced from 1989 through 1998 in Dodge Ram 2500 and 3500 trucks. The 1994-1998 trucks used the P7100 injection pump and are the most sought-after for performance builds.

  • The 12-valve (1989-1998) uses a mechanical injection pump; the 24-valve (1998.5-2002) uses a VP44 electronic pump. The 12-valve is preferred for high-power builds because pump modifications require no tuning software. Have a 1998.5+ truck? Shop our 24V Cummins parts.

  • The P-pump governor spring kit is the cheapest and most impactful first modification. Pair it with matched injectors and a cold-air intake for strong results without opening the engine.

  • The most common issues are worn injection pump delivery valves (hard starts), cracked fuel return lines, worn cam position sensors (1994+), and head gasket failure on high-boost builds. All are well-supported by the aftermarket.

  • A well-maintained 12-valve 5.9L routinely reaches 400,000-500,000 miles. Trucks with 600,000+ miles on the original block are documented. Key factors: regular oil changes, clean fuel, and maintaining the injection pump fuel supply.

Powerhouse Diesel