Losi Nascar Chassis only, no cutting or trimming of the chassis. No adjustable caster/camber/steering rods on the car (Box Stock)
Gear: 17t, 18t or 19t (48p) pinion / 59t Spur ONLY. **A hole will need to be drilled in the Top Deck in the Motor area to confirm the gear sizes.  
ESC: Stock,  SPMXSE3025RX Only
Servo: Box Stock - 20t spline SX108 Micro Servo
Battery: 8.44v max original Spectrum 1400mah 30c battery only. (SPMX142S30H2)
Tire: Any Losi 1/12 Nascar tire (Soft or Medium) in any configuration.  LOS-1937 SOFT or LOS-1914 MED
Body: Losi Nascar Chevy, Ford or Toyota only, Must have numbers on the roof and each side. Must use stock Spoiler, body must be cut on the factory cut line, rear can not be cut out. Must use Stock Bumper, Splitter and Diffuser. No body scraping on the carpet!
Radio: Stock out of the box
Weight Min: TBA
Shocks/Springs: Box Stock, may change fluid / internal shock limiters are okay
Diffs: Stock, front and rear must rotate with minimum effort, may add fluid, no one way bearings.
Metal Bearings only, NO CERAMICS!
Mods: NONE. This class is intended to be a entry level to intermediate cost effective way to get into Oval or On-Road Carpet racing.

Copied from: https://www.highvoltagercspeedway.com/class-rules