Recent Articles
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.
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.
How to Keep an Old Diesel Truck on the Road
The path to half a million miles is more commonsensical than you think.
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 8
You can’t quadruple a diesel’s torque output without upgrading the transmission, so now it’s time to bulletproof the E4OD.
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.
