SECTION 4 DESIGNATION: A/D - preceded by car number. B/D - preceded by car number. *BODY: All bodies must be 1/24th or 1/25th scale. All styrene bodies must be kit based model only. Resin cast bodies allowed. Vacuum formed styrene or lexan not allowed. No body modifications allowed. Dragster must have "skirts" if included in model kit. *INDUCTION SYSTEM: Must run full plastic motor from model kit, bottom can be cleared for clearance. *WEIGHT: 85 grams minimum weight. *REAR/WING: "Top Fuel style wings mandatory. Styrene, resin allowed. Wing must be 3-1/4" in height plus or minus 1/4" from bottom of chassis. *CHASSIS: Unlimited; Motor must be mounted in an inline configuration; ball bearings allowed. *FRONT WHEELS/TIRES: Required; Wheel Hub Diameter 1/2" minimum diameter. *REAR WHEELS/TIRES: Wheel Hub Diameter 5/8, Tire Diameter Minimum diameter 1- 1/16" (1.0625"). Minimum tire tread width fully contacting track surface, 1/2" (0.500") Slitting or grooving of tread area of tires prohibited. *WHEELIE BARS/WHEELS: Permitted; Total length cannot exceed 5" from center-line of rear axle to center-line of wheelie wheels. *MOTOR: A/D - ProSlot VR-eXtreme: Part Number PS-4021, ball bearing permitted. B/D - ProSlot VR-20: Part Number PS-4020, ball bearing permitted. *GUIDE FLAG: One guide flag per dragster, 1 inch maximum length. Click Here: For Motor Requirements & Specifications. Click Here: For General Regulations. If there is any area of these rules which needs clarification, please contact CLUB (.400) Technical Director by e-mail at club400@hotmail.com