Collin Casstevens aims for 1,000 horsepower with his 2007 duramax street truck.
How many of us have bought a truck thinking, “I’ll just do exhaust and a chip?” How many of us have actually stopped there? Collin Casstevens from Middle-town, Indiana, had the same idea when he bought his 2007 GMC Sierra 2500—until he caught the diesel performance bug and saw the possibilities. Working at one of diesel motorsport’s hubs at Fleece Performance Engineering at the time of the build, and now as a machinist for Neturen USA, the 21-year-old Casstevens well knew the potential inside his Duramax, and the idea of a 1,000hp street truck was too much temptation to pass up. With the help of several of the industry’s top shops and their best components, he set out to overhaul his daily driver into a road warrior.
After Casstevens initially did his exhaust work and a tune, he felt compelled to give the truck a little more. Once he had bolted on a stock appearing Fleece Cheetah turbo, upgraded CP3 and new injectors, he realized he was going to have to bolster his stock Allison transmission to handle the power he was making with the upgraded Duramax. Jacob Richards at Fleece helped Casstevens tear into the transmission to install a SunCoast Diesel 6Pac kit with Raybestos clutches, Transgo Jr. shift kit, a SunCoast Diesel 1058 billet triple-disc torque converter, Fleece Performance AlliLocker, and Merchant Automotive’s Pump Rub upgrade and transfer case brace. With his newly rebuilt transmission, the truck seemed like a complete build—until Richards said, “You should be good to go now, unless you want to build the motor.” All it took was that seed of an idea to get Casstevens’ mind churning, envisioning a 1,000-horsepower street beast.
Denne historien er fra June-July 2017-utgaven av Ultimate Diesel Builder Guide.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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Denne historien er fra June-July 2017-utgaven av Ultimate Diesel Builder Guide.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
Allerede abonnent? Logg på
Orange Crush
Michael Dalton's Sweet 2012 RAM Drag truck.
Project Work Truck
Rebuilding The 4R100 Transmission For Towing And Hauling
Spring Fling
First annual diesel thunder spring break drag race in Holt, Florida.
D-Max Fuel System Upgrade
More fuel means more power!
Internet Powerhouse
High horsepower from a 6.7l cummins via the internet.
Trump Card
7-time national champion Shane Kellogg’s super stock puller.
Hi-Po Sierra
MICHAEL CERVI’S 1,300-HORSEPOWER 2004 GMC SIERRA
Do It Yourself
G2 Diff Cover Install.
All Diesel Day
The 2016 Valley Blackout Invades Louisville, KY.
irregular cab
eric helton’s stunning regular cab 2006 dodge dually.