TO: ALL NASCAR K&N PRO SERIES WEST CREW CHIEFS, CAR OWNERS AND DRIVERS
The following is an addition to the Official Entry Blank for the COLORADO NAPA “150” NASCAR K&N Pro Series West Championship event to be held at Colorado National Speedway on Saturday, June 8, 2019:
SOUND REQUIREMENT: Cars must not exceed a maximum sound level of 95 DBA maximum @ 100 feet. Sound level measurements will be acquired using an official NASCAR meter at the NASCAR designated location only. Any car exceeding the maximum sound level during practice will be black flagged and will be required to take corrective action before they are allowed to continue to practice. Any car exceeding the maximum allowable DBA reading will be subject to a NASCAR penalty.