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Performance Roadblocks of the ’89-‘93 5.9L Cummins

Breaking through your first-gen Cummins’ horsepower wall begins with a pair of pliers and a screwdriver.

Performance Roadblocks of the 6.7L Power Stroke

The 6.7L Power Stroke’s factory injectors can support 700rwhp—but it takes turbo and injection pump upgrades to get there.

4BT vs. R2.8—Which is the Better Small Displacement Cummins?

Tried and true mechanical simplicity meets modern age tech in this battle of mini diesels.

Mobile Media Machine: Humble Beginnings of a Diesel-Powered Off-Road Camper Van

Does the perfect off-road camping setup exist?

How to Keep an Old Diesel Truck on the Road

The path to half a million miles is more commonsensical than you think.

Product Spotlight: Mishimoto’s 6.7L Power Stroke Air-to-Water Intercooler

A 6.7L Power Stroke upgrade that offers vastly-improved durability, 22-percent more airflow and 40 lb-ft gains on the dyno.

Project Paw-Paw: Part 11

567rwhp, 13-second quarter-miles, same old factory look.

Decoding an Off-Road Tire: What the Numbers on Your Sidewall Mean

Those numbers on your tire's sidewall may look like gibberish, but what they say can make all the difference on your rig.

Project Paw-Paw: Part 9

With the engine and transmission mods complete, it’s time to reprogram the 7.3L’s brain: the PCM.

Project Paw-Paw: Part 8

You can’t quadruple a diesel’s torque output without upgrading the transmission, so now it’s time to bulletproof the E4OD.

Project Paw-Paw: Part 7

Double the flow and triple the boost—our 600hp 7.3L Power Stroke project wouldn’t be possible without a sizeable turbo upgrade.

Leading Edge: 9 Industry-Changing Parts from PRI 2019

High-flow turbos, near-bulletproof rear-ends, cutting-edge fuel system technology, budget engine blocks and more…here’s to a prosperous 2020 in motorsports.

The Easy Way to Refinish Carbon Fiber

How to restore old, oxidized and weathered carbon fiber.

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