NASCAR announced Wednesday that Chad Walter, crew chief of the No. 24 Chevrolet driven by Casey Mears, and Tony Eury Sr., crew chief of the No. 88 Chevrolet driven by Brad Keselowski in the NASCAR Busch Series, have been fined and penalized due to rule violations at Texas Motor Speedway.

The infraction was discovered during pre-race inspection on Nov. 3.

Both crew chiefs were fined 10,000 USD and placed on probation until Dec. 31, 2007, for violating Sections 12-4-A (actions detrimental to stock car racing), 12-4-Q (car, car parts, components and/or equipment used that do not conform to NASCAR rules) and 20A -- 10.7F (lug nuts were not fully threaded; threads had been removed) of the 2007 NASCAR Busch Series Rule Book.