Haha stock
"The most remarkable thing about the F-250’s speed is that it the truck remains mostly stock. Ford says that it...
only installed a high pressure fuel pump, new fuel injectors, new turbos, and modified the compression ratio... aerodynamic fairings for the front bumper, and the obligatory salt flat moon-dish wheels. The F-250’s drivetrain and transmission were stock."
That is in no way stock, "Drivetrain may refer to: Powertrain, the group of components in a motor vehicle that generate power and deliver it to the road surface"
So how is changing everything other than the block and heads make it stock?