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Official 2027 Class Rules

Class 03

All Motor

Technical requirements for this competition category at OSW Import Fest 2027.

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Category All Motor
Rule sections 9

General

  • Vacuum pumps are permitted
  • Dry sump oil system or external oil pumps prohibited

Fuel

  • VP-M1

Clutch

  • The use of slider, adjustable, or slipper style clutch prohibited

Engine / Weight — K and F series

  • 99.9mm 1,800lbs
  • 102.9mm 1,825lbs
  • 106.9mm 1,900lbs

Engine / Weight — B series

  • Up to 2.7L 1,650lbs

Engine / Weight — H series

  • Up to 2.5L 1700 lbs
  • Up to 2.7L 1800 lbs

Engine / Weight — 6-cylinder

  • J series up to 3.7L 2100 lbs

Engine / Weight — Nissan

  • SR20 any size engine 1800 lbs

Engine Containment Device

  • Engine diaper or catch pan device to capture oil and/or debris is mandatory

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