Work Stock (WS) class is designed for daily-driven, on-the-road
pickup trucks (full-bodied diesel pickup trucks). Valid
DOT registration and license plates are mandatory.
The OEM chassis is mandatory. The engine must be in the
OEM location for the body used. The vehicle must retain
the full OEM chassis. Wheel tubs, back-half conversions,
tube chassis, etc., are prohibited.
Credentials: All drivers must have a valid state
driver’s license. And a proof of
valid insurance may be required.
The engine is limited to a stock-appearing, OEM
compression ignition engine, available from the factory
in a one ton or smaller truck.
An OEM transmission and transfer case are mandatory. They
must have been an option on a one-ton or smaller pickup.
Injection Pump: The fuel injection pump is limited
to a stock-appearing, OEM engine model-specific
pump only. The use of multiple high-pressure common-rail
fuel pumps is prohibited. Pumps from different
years in the same engine model may be interchanged. P-pumped
24 valves will be allowed, automotive governor
only, No AG Governors. No Sigma or Multi Plunger
per cylinder pumps.
Meth, Propane, and Nitrous are PROHIBITED.
The turbocharger is limited to a stock OEM/Factory charger
only. 6.4L Powerstroke turbo is permitted.
Register for our Dyno Event
(only 35 stock, 25 2.6 class and 15 unlimited
class trucks will be on the dyno, pre-register to ensure
your spot today)