DANNY HORN’S 1,000-HP LMLBUG MOBILE
Mean Custom 1,000-horse Chevy LML
Forty-three-year-old Danny Horn is the owner of Tri-county Termite and Pest Control in Logan, Ohio, with the need for a multi-purpose truck that can be used for grunt duty at work hauling trailers, supplies and equipment, as well as to entertain corporate clients and satisfy his cravings for vehicular power. For most people, a brand-new Chevrolet Silverado 2500 HD with the LTZ and Z71 packages would be just right—but for gearheads like Horn you can never have too much, so he turned to the team at Wehrli Custom Fabrication in Sycamore, Illinois, to put his new truck under the knife for some major modifications.
Horn dropped the truck off at Wehrli, where Jason Wehrli and his team wrenched on it for about four months to deliver the masterpiece seen here just before the 2015 Scheid Diesel Extravaganza, where it made its debut and was displayed for all to see. The build team started with the simple things and installed the ProComp lift kit on the truck to give it an additional 4 inches of height and then added to that with a set of LT295/65R20 Toyo Open Country M/T tires that are wrapped around a set of blackand-chrome 20x9-inch Fuel wheels. To make sure the big tires stay pointed in the intended direction they installed a full Cognito steering brace kit and replaced the upper control arms with a Cognito set. To smooth out the ride they installed Rancho shocks on all four corners of the Chevy and then installed a set of 60-inch WCFAB traction bars to prevent the leaf springs from twisting under power.
With the truck looking good and sitting tall, the team turned its attention to the engine. Horn wanted to make four-digit horsepower so they knew the stock LML internals would need to be upgraded. They yanked the engine out of the truck and tore it down. The factory LML crankshaft swings around a set of forged Carrillo rods connected to a set of Mahle oval bowl pistons yielding a 16.5:1 compression ratio. While the Wehrli crew was working on the short block they sent the heads out to Pfieffer’s Engine Specialties in Freeport, Ill., to be ported and to receive a set of Socal Diesel valve springs.
When the heads returned they were reunited with the Duramax block using new head gaskets and ARP head studs. The stout long block is equipped with a set of 100% over Exergy injectors to deliver plenty of fuel to each cylinder. They also replaced the problematic factory CP4 high-pressure fuel pump with a pair of Sportsman Exergy CP3S using a Wehrli dual CP3 kit and CP4 replacement kit.
While the engine was being upgraded the WCFAB team went to work building up the Allison transmission to be able to handle the intended power levels. Inside the Allison they replaced the clutches with Suncoast/raybestos packs and upgraded to billet shafts in addition to making valve body and pump modifications. Before joining the rebuilt new engine to the rebuilt new transmission they installed a Suncoast billet flexplate on the back side of the Duramax and slipped a 2,400-rpm stall billet Suncoast torque converter into the Allison.
Then they dropped the engine and transmission back into the truck and went to work developing their LML triple turbo kit for the new-atthe-time 2015 trucks. For airflow, Horn chose to go with Wehrli’s S300-based triple-turbo kit that uses a trio of Engineered S366 turbos configured with two atmospherics and one high pressure for quick spooling, good drivability and enough
air to make big power on the top end. The intake charge is kept cool through an afe intercooler replacing the factory unit. Bright metallic red powdercoating adorns the compressor covers as well as much of the turbo kit piping and the fabricated coolant tank to dress up the engine bay and highlight the triple turbos. To keep the intake charge clean, a pair of afe Pro Dry S air filters is employed. On the exhaust side the modified Duramax exhales through a set of Profab Performance cast manifolds with custom-fabricated WCFAB 2-inch up-pipes, then to the turbos and out through a 4-inch exhaust system.
EFILIVE tuning from Motor Ops is employed to get the most performance and drivability out of the engine while allowing it to be used as a
daily driver and even tow heavy loads whenever needed. The truck has been measured at 1,041 horsepower and 2,030 lb-ft of torque on the chassis dyno to motivate Horn’s big Chevy with ease.
The inside of Horn’s fully loaded LTZ was left almost completely stock. With black leather seat upholstery, a large sunroof and a touchscreen entertainment system with navigation, what more could you really ask for? While the factory Chevrolet gauges are more informative than most, they still do not relay enough information to the driver of a high-performance 1,000-hp Duramax, so more gauges were necessary. But rather than cluttering up the cab with a ton of individual aftermarket gauges, Horn chose to go with a single Edge Products CTS monitor mounted near the A-pillar to help keep an eye on the engine’s vitals.
Few people have the courage to tear into and fully rebuild a brand-new truck. Fortunately for us, Danny Horn is one of them, and thanks to the fine work of Jason Wehrli and his team at Wehrli Custom Fabrication he has been rewarded for his fearlessness with a stunning 1,000-hp daily driver that will fulfill his wildest horsepower desires, as well as haul a trailer, deliver a great night on the town, or take him off-road in the wilderness. If you ever happen to pull up alongside a nice-looking black LML Silverado, you better be careful as you might get exterminated by this Triple Threat! UDBG
Below the cab you can see the Procomp dropped torsion bar mount as well as the FASS pump and filter system mounted forward of the fuel tank.
Since Horn uses the truck as his daily driver and has to haul work supplies for his pest control business from time to time, he had a Line-x spray-in bed liner applied to protect the inside of the bed.
Horn’s Chevy has a great stance with the lift and wheel/tire combination giving it an aggressive look without going so high that he couldn’t use the truck to tow.
This is the view most people will see of Horn’s 1,000-hp Duramax, which looks pretty unassuming; aside from the lift and tires, it looks pretty much stock.
Like the front, the rear of the truck sports a set of Toyo Open Country M/T tires wrapped around 20-inch Fuel wheels.
Horn’s truck is a great combination of elegance, sophistication and brute force strength, with stylish looks for a night on the town and the power to blow the doors off an unsuspecting exotic on the way home or to bomb through offroad trails.
Thanks to the billet grille inserts and bold GM design Horn’s lifted Chevy gives an imposing visual impression.
Cognito upper control arms work with Rancho shocks, Procomp spindles and Cognito steering braces to give the truck room to clear the big Toyos while keeping it comfortable on the road and pointed in the right direction.
The black and chrome 20x9-inch Fuel wheels match Horn’s Chevy perfectly; they are wrapped in aggressive LT295/65R20 Toyo Open Country M/T tires.
Danny Horn’s 2015 Chevrolet Silverado 2500 HD is a great looking daily driver that sports a triple-turbo 1,000-hp Duramax under the hood.
The LTZ is fully loaded with a sunroof and leather interior, making this 1,000-hp monster very comfy inside.
An Edge Insight CTS display is used to augment the factory gauges and help Horn keep an eye on the Duramax engine’s vitals.
To make it easier to get into the lifted Chevy, Horn opted for a set of AMP Research motorized side steps.