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Motorsport Diesel

Diesel performance.
Built right.

Diesel performance parts, DIY upgrade kits, specialty tools, and fuel-system testing for people who would rather know what works than guess.

  • DIY performance parts and upgrade kits
  • Bolt-on diesel performance upgrades
  • CP3 service and assembly tools
  • CP3 / CP4 pump testing services
  • Common rail fuel injector testing
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DIY Performance

Power gains without price pains

Build more fuel into your setup with proven CP3 upgrade parts and purpose-built installation tools.

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In stock

DIY Stroker CP3 Kit

Rated 5 out of 5

More Flow. Less Cost. Real Performance Gains.

Unlock hidden power from your truck with the Motorsport Diesel DIY Stroker CP3 Kit. This precision-machined upgrade boosts fuel output without the price tag of a high-dollar stroker. Built by the original stroker CP3 pioneers, it delivers real flow gains with proven reliability. With an easy-to-follow installation process, this kit puts performance back in your hands. Whether you’re towing, racing, or daily driving, this is the fueling upgrade your truck’s been waiting for. Build it yourself. Feel the difference.

$395.00 – $799.00
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In stock

Machined Tappets

Precision-machined replacement tappets for CP3 clearance issues. Each three-piece set is reduced approximately 0.5 mm to eliminate shaft interference and fits 2007.5-2025 6.7 Cummins and 2006-2010 Duramax LBZ/LMM pumps.

$59.99 – $159.99
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In stock

CP3 Shaft Press Tool

A heat-treated chromoly press tool designed for precise removal and installation of CP3 pump shafts without damaging pump components. Fits 2007.5-2025 6.7 Cummins and 2001-2010 Duramax LB7, LLY, LBZ, and LMM pumps.

$99.00
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In stock

CP3 Tappet Tool

This 3-piece toolset is built for all CP3 pumps, giving you precision control and one-handed operation. Durable, compact, and includes replacement gripper pads and a storage case.

$79.99
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Coolant System

Stay cool under pressure

Control pressure, protect hard-working engines, and solve known Cummins cooling-system weak points.

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In stock

Dodge Cummins Coolant Bypass Kit

Maximize Performance. Minimize Heat. Protect Your Engine.

Overheating rear cylinders are robbing your 1998.5-2018 Dodge Cummins 5.9L & 6.7L of power and longevity-fix it in under 30 minutes with the Motorsport Diesel Coolant Bypass Kit. Engineered for superior cooling efficiency, this billet aluminum kit relieves excess pressure, reduces water pump strain, and prevents costly engine wear. Featuring a precision pressure relief valve, it dynamically regulates flow-something a thermostat simply can’t do. Whether you’re towing, daily driving, or chasing horsepower, this is the upgrade your Cummins can’t afford to go without. Get yours now and keep your engine running stronger, longer.

$349.00
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Testing Services

What's really going on under the hood?

Get clear pump and injector data before spending money on parts you may not need.

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The complete catalog

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Find CP3 pumps, DIY upgrades, cooling solutions, service tools, and fuel-system testing.

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