The Aftermath Of Playing With Fire! (2,000 LB-FT Stock Bottom End L5P)

All In Truck Performance’s Neal Driedger knew what he was getting into with his stock long block, compound turbo’d, nitrous-fed, and well-fueled L5P Duramax when he made multiple hits above 1,500 hp on the dyno. So, after hurting the engine aboard the rollers at U.C.C., he fully expected to find major carnage upon breaking the seal on the late-model V-8. Instead, he found a blown head gasket, some cylinder head damage, and two slightly shortened connecting rods. At 1,516 hp (and 1,931 lb-ft of torque), nothing failed catastrophically. We think it’s safe to say the L5P is the toughest Duramax GM has ever produced.

In The Dirt

Jeremy Yeager’s Other Super Stock Truck

Remember this beautiful Cummins-powered, ‘68 Chevy C30 once known as “Grin-N-Bair-It” driven by Jon Bair? It’s now in the hands of Jeremy Yeager and goes by the name “Trencher.” It’s also the second Super Stock diesel truck in Jeremy’s stable and will park next to his Chaos-built, Cummins-powered “Pipe Dream” Silverado. The orange Chevrolet made its 2025 debut over the weekend at the Power Pull Nationals in Hutchinson, Minnesota and traveled 274.25 feet with the sled in tow for a 10^th Place finish Friday night. Shane Kellogg would take the win behind the wheel of “Trump” on the same night, followed by Craig Dickey inching past Shane in Cummins Killer III on Saturday.

Exotic Engine Tech

4,000 HP Solutions: Wagler Rocker Studs For Aluminum Cummins Heads

Beyond creating billet-aluminum versions of the Cummins, Wagler Competition Products is constantly working to better its engines. Thanks to partnering with names like Jesel Valvetrain and ARP, the issue of rocker studs pulling out of its aluminum cylinder heads should be solved for good. Stronger, higher quality studs that thread deep into the block will improve reliability in these high-horsepower, high speed applications, and Wagler will now include them on every new CX series engine it builds. These are the types of improvements that will pave the way to 3,500+ and eventually 4,000 hp.

Stainless Diesel’s New Top-Feed Style Injector Setup

Stainless Diesel might’ve made the transition to common-rail engines in recent years, but they haven’t given up on the Cummins that gave the company its start: the 24-valve 5.9L. In fact, Stainless Diesel’s latest pet project is designed to push VP44 performance to new heights. Pinky, the “9-second VP” Chevrolet S10 that spends most of its up-time performing burnouts these days, has been graced with a top-feed injector arrangement and injectors fitted with DDP 6×0.013 nozzles. By changing the injector’s position in the head (which serves to simplify and shorten the path fuel has to take) an additional 60 hp was freed up. Bonus: this system is also compatible with P-pumped engines…

At The ‘Strip

Warren Diesel’s U.C.C. Truck Is Fixing To Be A Monster

We hope no one thought the truck Jesse Warren brought to U.C.C. was a one-and-done proposition. In fact, it was only the beginning of what started out as a rolling chassis, obtained from Mike Miller and that was a project heavily associated with the late Gray’s Diesel Performance. Jesse’s 6.0L-based Power Stroke engine boasts a billet block and heads, 10mm HEUI injectors with 6×0.027 nozzles (that see an insane 6,800-psi worth of ICP), and a front-mount, 95mm GT55 turbo. The potent engine combo is backed by a 4R100 transmission that takes its cues from a PCS controller. The truck made 2,114 hp at U.C.C. before the big, under-wastegated Garrett let go—a new 6.0L Power Stroke chassis dyno record. After a few adjustments, Warren and team plan to make 2,500-plus hp—so make sure you stay tuned for that…

Written by Mike McGlothlin