600cc MICRO SPRINT RACE CAR SPECIFICATIONS (NOTE BOLDED LINES)

• Engine cannot exceed 637cc, aside from that anything goes. 
• Kawasaki 636 engines must retain stock bore and stroke. 
• Any carburetor or fuel injection system is allowed. 
• May run gasoline or methanol. 
• No fuel additives except for top-end lube allowed, this will be checked. 
• No forced air induction or nitrous systems. 
• Cars must be equipped with a working clutch and starter. Car must be able to start
• and take off under own power at the beginning of event. 
• Mufflers with packing are mandatory with muffler being firmly attached to either
• the chassis or nerfbar. 
• Car weight will be a minimum of 775lbs. 
• Tires on car may be Hoosier or American Racer Tires. 
• Right Rear tire must be a Hoosier NMMA tire or an American Racer MD57 and must durometer at least 50, both before and after the race  (15 minute cool down will be allowed after the feature before being checked). 
• Fire walls are mandatory between driver and engine. 
• Wings must be maximum 12 sq. ft.
• No radio or in-car communication allowed. 
• No Traction Control.

      ATTENTION PA 600cc SPEEDWEEK PARTICIPATING TRACKS

• A 2008 PA 600 Speedweek participating speedway CAN NOT run a 600cc Micro Sprint Show during any other Speedweek race.  Tracks that ignore this rule will lose their Speedweek date and will be eliminated from all future speedweeks.