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  • A 550hp 2004 Chevy 2500HD Duramax Stops Traffic & Stomps The Competition

A 550hp 2004 Chevy 2500HD Duramax Stops Traffic & Stomps The Competition

Radical Red Silverado Looks Good, Runs Hard

Jason Sands
Jun 22, 2015
Photographers: Jason Sands
It’s widely assumed that show trucks, while fun, are built primarily for displaying at events or sitting in driveways. When Kris Femenia showed up at a dyno day with his truck sporting chrome lower control arms, we wondered what the story was and thought to ourselves, Surely, this can't be a street truck!
Photo 2/22   |   2004 Chevy Silverado 2500 Side
The truth is, Kris’ ’04½ Chevrolet Silverado 2500HD definitely is a streeter, and it has the gooseneck hitch and road miles to prove it. Kris really went the distance with his build, even extending his modifying efforts to the interior. However, the 2500HD isn't just another pretty face. Its 6.6L engine actually makes some steam, thanks to a host of upgrades it received.
While 450 to 475 hp is somewhat normal for Duramaxes with only a PCM tune, Kris went further than simple calibration and is currently sitting at a dyno-proven 548 hp at the rear wheels. The turbocharger, a rather large 68mm BorgWarner S400 built by God Speed Turbo Innovations, was mounted with a Wherli Custom Fabrication install kit. Exhaust exits via an HX40-style downpipe that continues on to a 5-inch Magnaflow exhaust with an AFE tip.
Photo 3/22   |   The engine in Kris' ’04 Chevrolet Silverado 2500HD is just as clean as the outside of the truck. The intake is painted translucent red, while the turbocharger is covered with a charcoal metallic. Rarely do we see engine bays that look this good.
Although Kris plans on upping his truck’s fuel game with a Dual Fueler and 60-percent-over injectors, until that time arrives the 6.6L Duramax is supported by a FASS lift pump, PPE fuel rails, and an LMM CP3 pump. Tuning is handled by Total Performance Diesel. The rest of the drivetrain and suspension have also been beefed up to handle the extra power of the modified Duramax.
Stock Allison 1000 automatic transmissions can start to slip with just a tune, so Kris knew he needed an upgrade. The transmission was completely rebuilt by Total Performance Diesel, using a PPE Stage 5 kit with a valve body recalibration kit and upgraded clutches and steels. A 2,200-rpm stall Precision torque converter was added, along with a BT DieselWorks Allison controller, to allow manual control of converter lockup.
Photo 4/22   |   Kris' rig’s suspension is heavily upgraded and customized with offset bushings, chrome Bilstein shocks, powdercoated and chromed control arms, and a 3-inch front lift that was designed and installed by TCS Suspension in Modesto, California.
A large amount of time and effort went into the suspension setup, which was done with the help of TCS Suspension out of Modesto, California. Kris didn't like the factory ride or stance, so a 3-inch ReadyLift front lift kit was added to level the truck, while the rear remains at the stock height. For a smoother ride, Bilstein shocks were also added at all four corners, along with offset bushings in the control arms. For four-wheel-drive launches, a PPE centerlink and Fabtech tie-rod braces were also added. TCS fabricated 70-inch chrome traction bars in the rear to match the control arms up front.
Photo 5/22   |   Since Kris plans to hit the track, custom 70-inch chrome traction bars from TCS will make sure the rearend stays planted.
The tires are 305-series Nitto Terra Grapplers, which are mounted on 20x12 Moto Metal 962 wheels. Power Stop slotted and drilled rotors highlight the Silverado’s braking system.
Before the body was sprayed, Kris made a few choice upgrades, such as installing a gooseneck hitch and an LMC grille and smoothing most of the truck’s panels. However, one thing that really sets Kris' Chevy apart from the crowd is its bright Victory Red paintjob by TCS. The bumpers were also color-matched when the paint was applied, as was the under-bed brace for the hitch. The interior also got the makeover treatment, with a suede headliner, charcoal-painted door panels, tinted glass, and a performance stereo system.
Photo 6/22   |   Chrome 20x10 Moto Metal wheels go quite well with the overall red and chrome theme of the truck.
While we're used to seeing nice newer trucks, the high level modifications throughout Kris’ truck, his attention to detail, and a bit of extra power combine to make one of the cleanest trucks we have seen in a while.
Although Kris was a bit disappointed with the lack of boost on his dyno run (33 psi versus 49 psi on the street), it's clear he has (at the bare minimum) a 550hp show truck that tows and is still daily driven. And that's not bad!
Photo 7/22   |   2004 Chevy Silverado 2500 Burnout
Fast Facts
Year/Make/Model: ’04½ Chevy Silverado 2500HD
Owner: Kris Femenia
Hometown: Sonoma, California
Odometer: 175,394 miles
Engine: 6.6L Duramax V-8
Fuel: FASS 150-gph lift pump, PPE ported fuel rails and plug, LMM CP3 pump, Total Performance Diesel tuning
Air: God Speed Turbo Innovations BorgWarner S468 turbo (68/87/0.90) mounted with a Wherli Custom Fabrication install kit, transparent red intake with a 5-inch filter
Exhaust: ProFab up-pipes; 4-inch HX-40–style downpipe; and Magnaflow 5-inch with a 7-inch, miter-cut AFE tip
Transmission: PPE Stage 5 Allison automatic transmission built by Total Performance Diesel, PPE pump rub kit, BT DieselWorks controller, and BD valet mode switch
Horsepower: 548 hp
Torque: 1,100 lb-ft
Tires: 305/50R20 Nitto Terra Grappler A/T
Wheels: 20x12 Moto Metal 962
Suspension: Bilstein 5100 shocks, PPE shock braces, Fabtech tie-rod braces, offset bushings in upper control arms, 3-inch ReadyLift suspension (front) to level truck, and chrome and powdercoating done by TCS Suspension
Axles: Stock with 3.73:1 gearing and Power Stop slotted and drilled rotors
Body: Victory Red paint by TCS; smoothed and color-matched tailgate, mirrors, and bumpers; B&W gooseneck hitch; Rhino Liner bed coating by Body Best in Sonoma; and LMC grille
Interior: Interior, dash, and doors painted Charcoal Metallic; Edge CTS; black suede headliner; custom tinting; and Eclipse GTS navigation/stereo head unit
Fun Fact: Kris’ Silverado has been clocked at 142 mph (using GPS), so it's clear all that suspension work isn't just for looks!
Photo 8/22   |   Despite the low boost numbers, Kris' Chevy made 548 hp to the wheels on a Superflow dyno. With Dual Fuelers and 60-percent-over nozzles, it should soon be closer to 650 hp.
Photo 18/22   |   Gauges are provided by a simple Edge CTS monitor, which is mounted inside a custom charcoal-painted dash.
Photo 22/22   |   2004 Chevy Silverado 2500 Rear Two Thrids

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