Extreme Desert Racing will be running two classes Modified Production and Pro UTV.
Pro class will use UTVRA rules.
Please see the EDR web site for the race schedule
http://www.texasoff-road.com/Schedule.html

MODIFIED  PRODUCTION  UTV (MPU)

This class is intended for Mass Production purpose built modified racing UTV’s based on stock production frame and engine combinations. Maximum displacement at the time of the writing of these rules is 850cc. (900 and 1000cc production units will be permitted with a time penalty added to the car number at the end of the race) Only vehicles marketed as a UTV in the United States of America will be allowed to compete. A detailed list of eligible UTV’s can be obtained by contacting EDR.
This is an open production class but all components must be OEM factory or After Market. OEM will be considered any item available for purchase from the UTV manufacture, and After Market parts will be considered parts sold to the general public. Any part custom made and not for sale to the general public will not be permitted, unless stated specifically in these class rules.

EDR General Rules
Vehicles shall comply with all General Rules unless stated in the class rules

MPU1: TRACK WIDTH
Maximum track width is 74”

MPU2: WHEELBASE
Maximum wheelbase is plus +/- 1.5” from stock as measured from center of spindle to center of rear hub.

MPU3: SHOCK ABSORBERS
One shock absorber per wheel maximum. Mounting locations may be modified or moved.

MPU4: BUMP STOPS
Solid bump stops only.

MPU5: SPRINGS
The only springing system allowed is a coil-over shock or alternately a coil carrier. OEM sway bars may be retained if they came stock from the factory)

MPU6: ENGINE
Mod class UTV engines must use stock type engine block and head castings. No internal modifications are permitted. No turbo chargers allowed unless used on diesel engines stock from the factory. External bolt on performance items will be legal.

MPU7: CHASSIS
Stock chassis is required. Chassis must match body, engine combination. Frame may be strengthened by adding material but basic shape and design must be maintained as well as stock dimensions.

MPU8: TRANSMISSION
Stock transmission and clutch design must be used. Stock rear differential must be used.

MPU9: ROLL CAGE
It is required that the Modified UTV class follow specific roll cage designs. Weld on or bolt on cages are allowed. All cages will be subject to inspection and approval by EDR Technical Director.  All UTV’s will be equipped with full steel and aluminum doors or permanent sides that leave no opening next to the driver and or co-rider. Doors may be fixed or able to be opened. If doors open they must have a positive locking system
(See roll cage specs below)
Roll cage construction material may be crew, DOM, WHR, WCR mild carbon steel or 4130 Chromoly.
EDR HIGHLY RECOMMENDS THE USE OF 4130 CROMOLY or 1018/1012/ASTM/DOM. All welds must be of high quality and craftsmanship with good penetration and with no undercutting of parent material. Stress relieve all welded intersections by flame annealing.
Roll cage Design:
All roll cages must be designed and constructed with one front vertical hoop, one rear vertical hoop, two interconnecting top bars, two rear down braces, one diagonal brace and all necessary gussets. The two top interconnecting bars must be placed as far to the outside of the top part of the front and rear hoops as possible. Rear down braces and diagonal brace must angle a minimum of 30 degrees from vertical. At the bottom of the diagonal brace there must be a cross member of the same tubing material and dimensions as the hoop. All roll cage components (hoops, braces, gussets, etc.) must have a minimum of 3-inch clearance from the component to the vehicle occupant’s helmets when occupants are seated in their normal riding positions. All portions of the roll bar or bracing that might come into contact with the vehicle occupant’s helmets must be padded.
Roll cages must be securely mounted to the frame or body. All intersecting points must be gusseted and braced. Cab or body mounted roll cages must be bolted through the body structure and be attached by use of a minimum two 0.1875-inch thick plates (one on each side of body structure). Bolts and nuts must be at least 0.375-inch-diameter s.a.e. Grade 8 or equivalent aircraft quality. Welding of cab or body mounted roll cages to body structure is strictly prohibited. Roll cage terminal ends must be attached to a frame or body member that will support maximum impact and not shear or allow more than 1.5 inches of movement in the cage terminal end.
All vehicles including those with stock steel doors must have at least one side bar on each side of vehicle that will protect occupants from side impact. The side bars must be of the same tubing material and dimensions as the rest of the roll cage. The side bars must be as close to parallel to the ground as possible, be located to provide maximum protection to the occupants, and be securely welded to the front and rear hoops. The location of the sidebars must not cause difficulty in entering or exiting the vehicle.
Gussets constructed of 0.125-inch x 3-inch x 3-inch flat-plate or split, formed and welded corner-tubing, or tubing-gussets made of the same material and thickness as the roll cage may be used. Gussets must be installed at all major intersections, including diagonal and rear down braces, where single weld fractures can affect occupants’ safety.
Restricted:
Oxy-acetylene brazing on roll cage is strictly forbidden.
Recommended: 4130 chromoly is highly recommended for all roll cage construction.
Examples of aftermarket expectable roll cages are as follows.
http://www.goracertech.com/rzr-rc2-race-roll-cage.html
http://www.rhino-roll-cages.com/rhino_p … r_cage.htm

The following are examples of illegal roll cages.
http://www.ocperformancemotorsports.com … ravel.html

MPU 10: FUEL CELL
It is highly recommended that Pro class rules be followed for every car however, the stock tank may be used. Tank must be stock and in stock location. Stock venting must be changed to a vent tube that follows the 3 sides and down routing system. The end of the fuel tank vent tube must to routed away from the exhaust. (THERE MUST BE A SKID PLATE MADE OF STEEL OR ALUMINUM MOUNTED UNDER THE STOCK TANK)
MPU 11: Harnesses
1. Heavy duty five point harness for driver and co-driver/co-rider.
2. Metal to metal connections and fast release buckles.
3. Two 3” or 2” shoulder straps and a 3” or 2” lap belt plus a minimum of one 2” anti-submarine lap belt.
4. Manufacturers name and date of manufacture on a label and SFI approved.
5. Harness material of nylon or Dacron.
6. Clean belts in like new condition and must be replaced after three years of the manufactured date.
7. Adjustment buckles must be at least 1 ½” from the seat to prevent chafing or loosening.

RECOMMENDED:
1. Seat belt replacement every year.
2. Sternum straps on shoulder harness.

NOT ALLOWED
1. Y type belts
2. Push button type release.
3. Dirty, stained, frayed or cut belts.
4. Outdated belts.
5. Surplus harnesses.

MPU 12: BATTERY
REQUIRED
1. One battery capable of starting the motor and operating all necessary lighting and electrical for the entire race.
2. Securely mounted with metal to metal tie downs.
3. Batteries mounted in the driver’s compartment must be covered with a case sufficient to hold the .entire acid content of the battery in the event of a rollover. A sealed non-acid battery is recommended
MPU 13: LGHTS

REQUIRED:
1. Two taillights (Stock OE lights ok)
2. Two brake lights. (Stock OE lights ok)
3. One rearward facing Amber light.
4.One rearward facing blue light
5. One Forward facing amber driving light

RECOMMENDED:
1. Two rearward facing AMBER lights, one flashing, one steady.
2. A minimum of two forward facing driving lights.

MPU 14: BUMPERS

REQUIRED
1. Rear bumper secured to frame constructed of 1 ½” x 0.90” minimum DOM or stronger tubing. 
2. Safe front bumper.
3. Ends must be capped and rounded to prevent any sharp edges.

MPU 15: NETS
Driver side and passenger side windows must be cover completely with a form of netting material. Net holes are not to exceed 2 inches.
MPU 16: ROOFS

REQUIRED
1. The roof must be covered by sheet metal or aluminum.
2. Must be a minimum of .060” in thickness.
MPU 17: NUMBERS
Any number 1800-1899
MPU 18: SAFETY EQUIPMENT
FIRE EXTINGUISHER
REQUIRED
1. Minimum 2.5 pounds “A-B-C” rated hand held fire extinguisher with a gauge.
FIRST AID
REQUIRED
1. A waterproof first aid kit must be on board vehicle at all times.
Communications
1 cell phone or 2 way VHF radio