Secondhand Rose
June 29, 2026
THE AUTO BUILDER
Featured
Products That Caught Our Eye at PRI 2025
The 2025 PRI Show in Indianapolis was a full-throttle showcase of performance automotive products, from street-ready upgrades to extreme race tech. We hit the floor to highlight the booths, parts, and builds that really stood out—gear that makes engines breathe better, weld stronger, and deliver reliable horsepower with precision.
MAKING GAS
Alternative-fuel sources and hybrid cars are all the rage today. Everyone from major automakers to backyard inventors is pursuing alternative fuels and energy sources. While the ultimate goal is generally to eliminate dependence on foreign oil, for hot rodders there is also the desire to invent and create a better-performing engine.
DEFYING NATURE
Traditional hot rods are all the rage, and while it’s a great experience to run across a true barn-find hot rod, some folks would rather make their own with the perfect blend of colors, textures and just the right amount of sanding. It’s definitely a way to grab attention, as these so-called beaters steal the show from some of the finest rods around, but there’s no doubt lots of time and money is spent to obtain this look.
Spotlighter
PRODUCT SPOTLIGHT: 1994-2007 Ford PSD DIESELSITE 40-Row Transmission Cooler
Push Your Powerstroke Further—Without the Heat Risk
When you're pushing the limits of your 7.3L or 6.0L Powerstroke Diesel—whether you're running big power or hauling heavy—you’re playing a high-stakes game with your transmission. Heat is your enemy, and stock transmission coolers simply weren’t designed for the kind of loads serious truck owners demand. That’s where DIESELSITE steps in with a battle-ready solution: the 40-Row Transmission Cooler.
Author
The Auto Builder Staff
Product Images Courtesy of Dieselsite
Designed to Dominate Heat
Unlike other aftermarket coolers that top out at 37 rows, DIESELSITE’s 40-row stacked plate design leads the pack in both fluid capacity and heat dissipation. This means more surface area, more cooling power, and more confidence—whether you’re towing up a mountain pass or hammering down the highway with a fully built rig.
Tested up to a jaw-dropping 90,000+ GVW, this cooler absolutely crushes the OEM spec of 28,000 GVW on 1999–2003 7.3L trucks. That’s more than triple the capability. Translation: no more sweating over transmission temps.
Built for Reliability. Backed by R&D.
Every DIESELSITE product is engineered with obsessive attention to detail—and this cooler is no exception. It’s purpose-built for both the 7.3L and 6.0L platforms, with hardware options tailored for each engine. Whether you’re a weekend warrior or daily workhorse, this cooler adds a massive layer of insurance to your build.
Why It Matters
Power means nothing if your transmission can’t keep up. Don’t let overheating sideline your investment. The DIESELSITE 40-Row Transmission Cooler is a must-have upgrade for anyone serious about protecting their drivetrain under pressure.
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