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Group F

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CHASSIS
  • Any steel chassis, NO homemade.
  • .047 ride height.
 
MOTOR
  • Unaltered Mid-America Phoenix or Phoenix Supra.
  • May notch motor to clear axle.
 
GEARS
  • 13 tooth pinion with open spur, 64 pitch ONLY.
  • Angled pinons allowed. NO angled spurs.
 
TIRES
  • Any rear, can run waffled rims.
  • Can cut, true, narrow tires.
  • Max .615 dia. hub.
  • 83 mm wide (3.25”).
 
AXLE & OILIETS
  • Any solid hardened steel axle.
  • Any oilites are allowed, NO ball bearings.
 
BODY
  • Any wing car body.
  • 2.5” air control devices (measured with Parma tech tool).
  • Must be painted w/ 3 numbers and driver.
  • Can reinforce body.
 
Any brand
  • Guide flag, lead wires and braid.
 
IF IT IS NOT LISTED, IT IS NOT ALLOWED!!
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  • Home
  • Hotels Near By
  • Services/Fees
  • Schedule
  • H&R Hardbody Rules
  • 4" NASCAR, LMP, GTP & DTM
  • 4" Retro NASCAR
  • Box Stock & Pro Indy Car Rules
  • Box Stock JK 4.5" Grand National
  • Stock Car, Legends & Mini-Crates Womp Rules
  • Mercury Box Stock Wing
  • Group F
  • Crate & Super Dirt Late Model Rules
  • Drag Racing Rules
  • Whelen (Asphalt) Modified Rules
  • H&R Limited Sportsman Hardbody Rules
  • H&R Sportsman Hardbody Rules