DAYTONA BEACH, Fla. -- Joe Gibbs Racing has suspended two Nationwide Series crew chiefs for the remainder of the season in the wake of penalties handed down by NASCAR after rule violations were discovered by inspectors prior to post-race testing on the chassis dynamometer Aug. 16 at Michigan.

NASCAR announced that seven crew members -- including No. 18 crew chief Jason Ratcliff and No. 20 crew chief Dave Rogers -- have been placed on indefinite suspension.

In response, team owner Joe Gibbs said in a statement: "A poor decision was made by some key members of our organization, and 100 percent of the blame rests with us."

Gibbs also noted that JGR would adding its own penalties to the team members on top of NASCAR's sanctions.

"We had come to the conclusion that we would add to any NASCAR imposed penalties with the minimum being suspension for the remainder of the season for those involved, including our two Nationwide Series crew chiefs. There will also be an additional monetary fine beyond the amount announced by NASCAR earlier today, which will be the responsibility of those involved."

A JGR spokesman confirmed to NASCAR.COM that team has suspended the seven crew members for the remainder of the season.

Both the Nos. 18 and 20 cars were found to be in violation of:

• Section 12-4-A (actions detrimental to stock car racing); 8-9 (competitive analysis -- from time to time, NASCAR may determine, in the interest of competition, that it is necessary or appropriate to undertake an analysis of the performance capabilities of a car, car part, component or equipment. The Competitor shall take whatever steps are requested by NASCAR Officials for this purpose. NASCAR also has the right to seal or impound cars, car parts, components and/or equipment for this purpose);

• Section 12-4-Q (1): (car, car parts, components and/or equipment used that do not conform to NASCAR rules, detailed in Section 20A of the 2008 NASCAR Rule Book, or has not been approved by NASCAR prior to the event, or is not required for the normal functional operation of the race car, or has been altered to detract from or compromise its integrity or effectiveness, whether operational or not);

• Section 12-4-K: (when NASCAR Officials mandate inspection during the Event, if any car, car parts, components, and/or equipment which have been used in the Event are taken from the racing premises without permission of a NASCAR Official, or are tampered with by any member of the team or anyone associated with the team: Magnetic spacer attached under the gas pedal with the intent of compromising the chassis dynamometer test).

As a result, NASCAR issued the following penalties: (Continued)