ULTRA4 Class Differences

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This is just a brief overview of the basic class differences that race in ULTRA4. Please Note: If you are planning on building and racing a car, you MUST consult the rulebook for ALL requirements for your desired class! This page is just a brief overview of the class differences.


4400: ULTRA4 Unlimited Class This is the original unlimited class that started the King of The Hammers. These cars compete during the main King of The Hammers race on KOH Week. 4400 Drivers have to earn a spot to compete in King of The Hammers. Currently drivers can qualify for the following year's race by: 1. Finishing top 20 at KOH or 2. Finishing as one of the top 10 non-qualified drivers at regionals and nationals. These cars  are not limited on tire size, engine or chassis design, other than to meet the safety requirements for the class. Unlimited cars must have a transfer case and be able to be driven in 4WD. These cars can be straight axle, or independent front suspension (IFS). 


4500: Modified Class This class has been racing in ULTRA4 since 2012. It is one of the 3 classes that races on KOH week during the \Every Man Challenge. Currently, these cars do not have to qualify to race in the EMC race during KOH Week.  At regional races, this class, if large enough, races on their own or can be on the track with the 4600, 4700 or 4800 cars. Class Characteristics:

  • Modified OEM Chassis or OEM Style Chassis
  • 2 -2.5 inch diameter shocks per corner
  • Mechanical Steering
  • 37” DOT approved tires

4600: Stock Class This class has been racing in ULTRA4 since 2012. It is one of the 3 classes that races on KOH week during the 4WP Every Man Challenge. Currently, these cars do not have to qualify to race in the EMC race during KOH Week.  At regional races, this class usually races with either the 4500 or 4800 cars.

Class Characteristics:

  • Stock OEM Frame
  • Factory Engine
  • Factory Transmission
  • 35” DOT approved tires
  • Single 2.5 inch diameter shocks per corner
  • Mechanical Steering

4800: Legends Class - Trophy Class This class has been racing in ULTRA4 since 2014. It is one of the 3 classes that races on KOH week during the 4WP Every Man Challenge. These cars do not have to qualify to race in the EMC race during KOH Week. This class is one of the fastest growing classes in ULTRA4 as older ULTRA4 cars can enter this class as long as they meet the requirements.

Class Characteristics:

  • Front mounted engines only
  • Vehicle must contain 2 seats side by side
  • Single shock per corner
  • Max 37” DOT non-sticky tires
  • Only solid axles allowed (not IFS or TTB)

4900: UTV Class:

Class Characteristics:


Desert Classes

T1:

T2:

B1:

B2:

B3: