•  Quality and design of body panels must meet the approval of WTC officials. 
   
• No air management devices under truck. This includes belly pans and air tunneling devices
   
• All panels must be securely fastened to vehicle.
   
• Truck must be at a level of appearance acceptable to WTC officials. WTC reserves the right to refuse any truck to participate based on appearance. This is at the sole discretion of WTC officials.  Exclusion from competition can be based on sponsor logos/ print /messages, number placement -design and slogans. 
   
• Sponsor advertising releases / ability to assign advertising rights may be required
   
• Nose Piece /Front Bumper Cover/wheel openings and sides
  • The measurement from outside to outside of the front bumper cover may not exceed 81.5 inches
  • The measurement from the front wheel tire bead surface located at axel height at it’s rearward most point and the outside surface of nose piece/front bumper cover cannot exceed 4.0 inches
  • No part of the body may extend past an imaginary that originates 2 inches out from the front wheel tire bead bead and extends rearward through a point 2 inches out from the rear wheel tire bead
  • All 4 wheels must be covered by body panels
    
• Numbers
  • Numbers are the sole property of WTC and the ProTruck Challenge.
  • A  minimum 24-inch high, 3-inch stroke must be located on the door area on both sides of the race truck.
  •  A minimum of 30-inch high, 3-inch stroke number is required on top of roof facing the passenger side of the truck.
  • One or two digit numbers only unless pre-approved
  • Duplicate numbers not allowed
  • Trucks with existing numbers shall be offered a renewal period in which to register for 2026.
  • The truck is not considered registered until the registration fees are paid in full.
  • Approval of the application , and assignment of numbers is at the sole discretion of WTC Series officials.

3.1 Bodies – Specific Rules A/B

• External bars    (Revised 5/21/17)
  • No bars allowed outside of bodywork
    • includes nerf bars, tow bars, push bars and bumpers
      and external bars made of  unconventional materials such as polycarbonate and carbon fiber
    • Rule may be waived for 1 event at the discretion of officials
    • RUB RAILS: If used, must be carbonate type as manufactured by Five star bodies or similar.
                              No solid types; must be mounted directly to body. Only (1) per side.
• Hood
  • Must remain sealed at fenders
  • No cutting or holes allowed
  • 2 Hood Louvers are allowed
    • “Run Cool” Louvers are recommended
    • Home built are allowed (Must meet WTC official’s approval)
    • Max size 9 inch by 14 inch
    • Location
      • 1 per side
      • Must be behind rear most edge of radiator
      • Must be installed on front half of hood
      • No portion shall be directly in front of air cleaner assembly width
      • No portion may be closer than 1 inch to the air cleaner assembly
• Roof height
  • 55 inches Except 2022 and newer Five star design
  • New Five Star design 56 inches
    
• Rear Deck
  • Minimum Rear deck height 38 inches
  • Max rear deck height 40 inches
  • Must seal with the exception of openings for Automatic Transmission cooler ventilation.
    
• Spoiler
  • Spoiler Angle 55 degrees
    • Must maintain spoiler angle with 15 lbs of pressure applied
    • Angle may be changed at the discretion of the series
      
  • Option 1
    • Flat-no lips or bends
    • 10 inch Min, 10.125 Max
    • Top edge must extend aft of the Top Edge of the Bumper Cover
    • Must extend entire width of rear deck
      • Left and right sides must be within 2 inches of outermost vertical plane of the fender
    • May be braced from behind only
    • Side Panels allowed
      • Triangular in design
        • Base minimum 20 inches
        • Base maximum 30 inches
          
  • Option 2
    • 8 inch Five Star MDS Dirt Late Model Spoiler
      • Must have all components of the kit installed and unaltered

3.2 Bodies – Specific Rules C
 External bars    (Revised 5/21/17)

• No bars allowed outside of bodywork
  • includes nerf bars, tow bars, push bars and bumpers
    and external bars made of  unconventional materials such as polycarbonate and carbon fiber
  • Rule may be waived for 1 event at the discretion of officials
  • RUB RAILS: If used, must be carbonate type as manufactured by Five star bodies or similar.
                            No solid types; must be mounted directly to body. Only (1) per side.

• Hood
  • Must remain sealed at fenders
  • No cutting or holes allowed
  • 2 Hood Louvers are allowed
    • “Run Cool” Louvers are recommended
    • Home built allowed (Must meet WTC official’s approval)
    • Max size 9 inch by 14 inch
    • Location
      • 1 per side
      • Must be behind rear most edge of the radiator
      • Must be installed on the front half of the hood
      • No portion can be directly in front of the air cleaner assembly width
      • No portion can be closer that 1 inch to the air cleaner assembly
        
• Roof height
  • 56 inches minimum to flat surface (Does not include roof rails)
  • Measured 10 inches back from leading edge of roof
    
• Roof rails
  • 2 allowed (Not mandatory)
  • May extend longitudinally from behind the front windshield along the top surface of the roof
  • Must be mounted in an acceptable manner
  • Must be one piece angle aluminum or steel
  • May not exceed .5 inches
    
• Rear Deck
  • Minimum rear deck height 38 inches
  • Max rear deck height 40 inches
  • Must seal
    
• Spoiler
  • Spoiler Angle 55 degrees
    • Must maintain spoiler angle with 15 lbs of pressure applied
    • Angle may be changed at the discretion of the series
      
  • Option 1
    • Flat-no lips or bends
    • 10 inch Min, 10.125 Max
    • Must extend entire width of rear deck
    • May be braced from behind only
    • Minimum 55 degrees
    • Top of the rear spoiler must be aft of the rear bumper cover
      
  • Option 2
    • 8 inch Five Star MDS Dirt Late Model Spoiler Kit
    • Must have all components of the kit installed and unaltered

3.3 Bodies – Specific Rules D

• External bars    (Revised 5/21/17)
  • No bars allowed outside of bodywork
    • includes nerf bars, tow bars, push bars and bumpers
      and external bars made of  unconventional materials such as polycarbonate and carbon fiber
    • Rule may be waived for 1 event at the discretion of officials
  • RUB RAILS: If used, must be carbonate type as manufactured by Five star bodies or similar.
                            No solid types; must be mounted directly to body. Only (1) per side.
• Hood
  • Must remain sealed at fenders
  • No cutting or holes allowed
  • 2 Hood Louvers are allowed
    • “Run Cool” Louvers are recommended
    • Home built are allowed (Must meet WTC official’s approval)
    • Max size 9 inch by 14 inch
    • Location
      • 1 per side
      • Must be behind rear most edge of the radiator
      • Must be installed on the front half of the hood
      • No portion shall be directly in front of the air cleaner assembly width
      • No portion may be closer than 1 inch to the air cleaner assembly
        
• Roof height
  • 52 inches  
  • Measured 10 inches back from leading edge of  roof
  • D Chassis must use AR or approved extended cab // full size roof
  • D Chassis is recommended  to add 13-15 inch extension to roof to upgrade to full size. 
     
• Rear Deck (includes Seekonk Metric)
  • Minimum Rear deck height 37 inches
  • Max rear deck height 39 inches
  • Must seal with the exception of openings for Automatic Transmission cooler ventilation.
    
• Spoiler
  • Spoiler Angle 55 degrees
    • Must maintain spoiler angle with 15 lbs of pressure applied
    • Angle may be changed at the discretion of the series
      
  • Option 1
    • Flat-no lips or bends
    • 10 inch Min, 10.125 Max
    • Top edge must extend aft of the top edge of the bumper cover
    • Must extend entire width of rear deck
    • May be braced from behind only
      .
  • Option 2
    • 8 inch Five Star MDS Dirt Late Model Spoiler
      • Must have all components of the kit installed and unaltered

3.4 Bodies – Specific Rules S Metric

• External bars
  • No bars allowed outside of bodywork
    • includes nerf bars, tow bars, push bars and bumpers
      and external bars made of  unconventional materials such as polycarbonate and carbon fiber
    • Rule may be waived for 1 event at the discretion of officials
    • RUB RAILS: If used, must be carbonate type as manufactured by Five star bodies or similar.
                              No solid types; must be mounted directly to body. Only (1) per side.
• Hood
  • Must remain sealed at fenders
  • No cutting or holes allowed
     
• Roof height
  • 53 inches
  • Measured 10 inches back from leading edge of roof
     
• Fender
  • Must cover front tire entirely
     
• Rear Deck
  • Must cover rear tires entirely
  • Max rear deck height 40 inches
  • Must seal
     
• Spoiler
  • Spoiler Angle 55 degrees
    • Must maintain Spoiler angle with 15 lbs of pressure applied
    • Angle may be changed at the discretion of the series
      
      
• Option 1
  • Flat – No lips or bends
  • 10 inch min / Max 10.125
  • Top edge must extend aft of the top edge of the bumper cover.
  • Must extend entire width of rear deck
    • Left and Right sides must be within 2 inches of outermost vertical place of fender
  • May be braced from behind only
  • Side panels allowed
    • Triangular in design
      • Base minimum 20 inches
      • Base Maximum 30 inches
        
• Option 2
  • 8 inch Five Star MDS Dirt Late Model Spoiler
    • Must have all components of the kit installed and unaltered
      
      
      S Metric Body Rules
      
       
• H   53 inches 10 inches back from leading edge of roof
• K   36.750 minimum inches
• K   38.250 maximum inches
• Q   74 inches maximum
• Windshield angle 38 degree minimum