Snow White: The Giant Slayer
Our 2013 Shelby GT500, the world's quickest at the time. A built 5.8L on a 4.5L Whipple and E85, making 1,236 rwhp and running 9.39 at 147. King of the Street champion.
From Bolt-Ons to King of the Streets
Early on, Snow White got the typical Lethal recipe: intake and exhaust tweaks, a custom Lund Racing tune, and even a shot of nitrous for good measure. The results were immediate. We went from a stock 590 rwhp to 763 rwhp with basic bolt-ons and a 150-shot of nitrous, rocketing the car into the 9-second quarter-mile zone. Snow White blasted down the strip at 9.77 at 148 mph with those initial mods, effortlessly hitting what we call Lethal mode. But we were just warming up.
Next, we swapped on a truly gigantic supercharger, first a 4.0L Whipple and later an even larger 4.5L, plus a built engine to handle the boost. With the fuel system upgraded to our triple-pump setup and everything dialed in on E85, Snow White roared out 1,236 rwhp on the dyno. That power translated to real performance: Snow White became the world's quickest 2013 GT500, ripping a 9.39-second quarter mile at 147 mph. We took home the crown at the prestigious King of the Street competition, beating the nation's highest-horsepower street Mustangs. We eventually auctioned Snow White to a lucky new owner, but her legacy remains a huge point of pride for us.
- Whipple 4.5L supercharger with 170mm throttle body
- Built 5.8L by MPR Racing: Diamond pistons, Manley rods, ARP hardware
- Heads ported by Kris Starnes: Bullet cams, Ferrea valves
- DivisionX triple-pump return-style fuel system
- Injector Dynamics ID2000 injectors
- ATI 15% overdrive dampener
- Thump Racing heavy-duty belt tensioner
- JLT 148mm big air intake
- JLT oil separators (driver and passenger)
- American Racing Headers 2" longtubes with off-road X-pipe
- Magnaflow street-series axleback with Lethal over-axle pipes
- Custom E85 tune by Lund Racing
- Trunk-mounted intercooler tank
- Eibach Pro-Kit lowering springs
- Viking adjustable rear shocks
- UPR Pro-Series rear suspension kit
- UPR anti-roll bar kit
- BMR radiator support sway bar mount delete
- BMR driveshaft safety loop
- True Forged 20" Sebrings in matte black
- Mickey Thompson 305/35/20 ET Street R radials (rear)
- Nitto 555 Extreme (front)
- Brand-new OEM Ford TR6060 6-speed manual transmission
- McLeod Racing RXT1200 street twin-disc clutch (1,200+ rwhp rated)
- Barton Industries short-throw shifter
- Built 8.8 rear end with Lethal S197 upgrade kit
- 3.55 gears
The parts we used:
Vi-King Performance 05-2014 Mustang Single "Crusader" Double Adjustable Shock - Drag over 600hp Valving (Stock - 2" Lowered) - (1 Strut)
2-3/4" T304 Stainless GEN2 Over Axle Pipes (2011-2014 Mustang GT / 2012-2013 Boss 302 / 2011-2014 Shelby GT500)
American Racing Headers 2011-2014 Shelby GT500 2" Longtube Headers w/ 3" Off Road X-pipe
Thump RRR Racing PM-1005-GT500 2007-2014 Shelby GT500 Heavy Duty Belt Tensioner
S197 Axle & Differential Upgrade Kit with Eaton True-Trac 31 Spline Differential (2005-2014 Mustang GT / Boss 302 / Shelby GT500)
S197 Axle & Differential Upgrade Kit with Ford Performance 31 Spline Traction-Lok Differential (2005-2014 Mustang GT / Boss 302 / Shelby GT500)
Viking Performance B626HM Triple Adjustable Crusader Single Rear Shock DH Series 0-1.5" Drop (2005-2014 Mustang) - (1 Strut)
Videos of Our 2013 Shelby GT500
Dive into the transformation of Snow White from stock to King of the Streets.
The 4.5L offers increased airflow and better thermal efficiency over the 4.0L, especially at higher boost. On the same pulley setup, we picked up around 130 rwhp just from the swap.
A DivisionX return-style system rated for 1,800 rwhp, using triple pumps and ID2000 injectors. E85 needs significantly more fuel volume than pump gas, so proper headroom is critical.
With a 3.50-inch upper pulley and the ATI 15% overdrive balancer, we saw about 24.8 psi with the 4.5L Whipple setup.
The TR6060 gave us street drivability and strength. With a McLeod RXT twin disc and proper tuning, it handled 1,200+ rwhp without drama, and kept the car engaging to drive.
A damaged balancer took out the crankshaft during a dyno pull. It forced a full rebuild, but also gave us the chance to go bigger and stronger with the internals.
Want a build like this?
Snow White might have been sold to make way for the next generation of Lethal builds, but she left her mark. From dyno data and drag-strip wins to magazine features and customer inspiration, this GT500 proved what's possible when you build smart, tune hard, and go big.
Snow White is what a built 5.8L, a big Whipple, and the right fuel system do on E85. Tell us your platform and power goal and we'll spec the build.