Steve Addington, who helped guide Penske Racing driver Kurt Busch into NASCAR’s Chase For The Sprint Cup in 2010 and 2011, has parted ways with the team, according to Penske officials.

“Steve Addington is no longer with our organization. We appreciate the successes we experienced together and wish him the best in his future endeavors," the team said in a statement issued Tuesday.

Addington and Busch won four Cup races in their two seasons together, but Busch, who won a Cup title in 2004, finished outside the top 10 in points both seasons.

This year’s run through the 10-race playoff saw Busch win once, at Dover, but struggle in the final seven races. A transmission issue in the season-ending Ford 400 at Homestead-Miami Speedway eventually resulted in a 34th-place finish.

Addington could be headed to Stewart-Haas Racing where he would become crew chief for 2011 Cup champion Tony Stewart. Stewart’s crew chief, Darian Grubb, confirmed after Stewart won Sunday’s race and wrapped up the championship that he would not be back with the organization.

Prior to moving to Penske, Addington worked with Busch’s younger brother, Kyle, at Joe Gibbs Racing and drivers J.J. Yeley and Bobby Labonte prior to that.

He won 12 races with Kyle Busch, including four in 2009 when the No. 18 team failed to qualify for the Chase.

Penske officials have not announced a replacement for Kurt Busch.