The only car approved to compete in this category is the Ligier JS F4, with either Crawford or Ligier bodywork.
The car must remain as provided by the manufacturer, without modifications except those specified in these regulations.

All cars must be equipped with the cockpit protection device (HALO) provided by the series and installed by a series-approved installer.

The front and rear wings will be regulated by the series; any updates will be announced in advance for replacement.
They must be original Ligier parts.

ENGINE

The only approved engine is the HONDA K20 C1, supplied by Mountune or Quicksilver.
All engine seals must remain intact and unaltered. All engine components must be of the original factory material, size, and weight.

The series will seal the engines at the beginning of the season and replace them when the engine is replaced.

Approved Engine Oil:
Redline Pro OW-20
Mobil OW-20
The engine must hold X liters of oil.

Oil Pump Pressure:

Minimum

The minimum oil level will be measured with the Ligier oil dipstick.
The dipstick support on the engine must be the original factory support.

Engines will be subject to technical inspection at any time during the activity weekend for review or disassembly.

GEARBOX

Crown and Pinion 10:31
1st Gear 14-35
2nd Gear 18-35
3rd Gear 18-28
4th Gear 21-28
5th Gear 24-28
6th Gear 22-23
The gearbox must remain with all gears in all gears as supplied by Sadev, without any modifications, coatings, or treatments.
The gearbox will be subject to technical inspection to determine its minimum oil level and any modifications it may have at any time during the activity weekend.

SUSPENSION

All suspension components must remain in their original condition as supplied by Ligier for this model.

The series will provide an optional manufacturer.

APPROVED SPRINGS

HYPERCOIL OR EIBACH 36mm INSIDE
Minimum Spring Load: 500LB
Maximum: 1100LB
Spring Length: 4 or 5″
SHOCKS
JRI (supplied by Ligier or JRI)
All shocks must be sealed. If they are not, technicians may retain them for shipment to JRI for analysis.

BEARINGS

As supplied by LIGIER
Alternator
Must be original and generate the factory-specified voltage or the voltage indicated by the serial number.

BRAKES

Caliper must be Brembo N XA6L611 right side
XA6L612 left side
Disc must be Brembo N XB4.54.10 front and rear
Brake Pads PFC compound 11 or 13
Santoro Racing SC1152 Q41

BODYWORK

All body panels must retain their original dimensions and shape as provided for this car model. All panels must remain securely fastened with the original hardware. They must maintain their original and secure shape.
FLOOR SKID
The floor skid may be manufactured by a category supplier or an alternative and modified one. It must have exactly the original dimensions in both width and length.
WEIGHT
MINIMUM WEIGHT: 1430 LB (including driver, fluids, and inner tube)
BALLAST
Balance must always be securely placed in the following locations:
Inside the cab (under the seat, behind the pedals)

All placed ballast must be securely fastened, declared, and sealed by the technical inspector and approved by them before use.

WHEELS

Only LIGIER wheels manufactured by TEAM DYNAMICS for the LIGIER JS F4 are authorized, maintaining their original weight.

TIRES

Only tires are permitted. HANKOOK Slick -13 180/550R13 C92 (front) and HANKOOK Slick-13 240/570R13 C92 (rear) tires.

SAFETY

All cars in the series must have valid 6-point seat belts.
Fire extinguishers must be charged and up-to-date.
Drivers in the series must have their current and approved racing gear.
ECU

SANCTIONS: Any team that does not comply with the regulations will be excluded from the event and fined.

CROSS INSPECTION: All members of the series may attend the category’s technical inspections.

MEDIA: All onboard cameras must be submitted upon request to the series for uploading to its website or channel.

FUEL: The series will determine each weekend which gas station will provide the 93-octane fuel sample for technical testing.

FUEL: From there you can buy fuel for the whole weekend