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ALL CLASSES MUST RUN MUFFLERS AND BE BELOW 95DB AT 100'

Cottage Grove Speedway has strict noise regulations requiring all cars to remain at or below 95 decibels at 100 feet. Please remember the following muffler rules are in place in each class to ensure that we stay within those guidelines. All cars MUST be under 95 decibels or you will not be allowed to race!! If you are above the decibel limit with an approved muffler you will also be required to run turn downs. Thank you all for your cooperation and we can’t wait to see you at a race soon!!

Hornets – Must be below 95 dba at 100’

Street Stocks – All cars must run mufflers at all times and not exceed 95 dba’s @ 100 feet.

IMCA Sportmods – Schoenfeld mufflers, stamped IMCA309, IMCA930, or IMCA935

Mohawk Metal Modifieds - Schoenfeld mufflers, stamped IMCA309, IMCA930, or IMCA935

Todd’s Auto Body Sprints - Mandatory: Mufflers- Spin Tech or Flowmaster, Loback 24” inner core note, Spin Tech or Flowmaster must be the big muffler no small Spin Tech or Flowmaster’s allowed. Part #1545, Schoenfeld part #14272735-78 - No Supertraps

Late Models – Mufflers required - 95 db’s @ 100 ft.

360 Sprints - Mandatory: Mufflers- Spin Tech or Flowmaster, Loback 24” inner core note, Spin Tech or Flowmaster must be the big muffler no small Spin Tech or Flowmaster’s allowed. Part #1545, Schoenfeld part #14272735-78 - No Supertraps

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