In 2006 Ambrose left V8 Supercars to pursue a career in NASCAR, and Pirtek withdrew its sponsorship. Former F1 Test Driver James Courtney was signed to drive the No. 4 car, now sponsored by Jeld-Wen. Ingall continued in the Caltex entry, but couldn't defend his title – eventually finishing a disappointing eighth. Courtney improved throughout the season to finish 11th, and won Rookie of the Year. The highlight of the year was the team's performance at the Bathurst 1000, with Courtney and Glenn Seton third, and Ingall and Luke Youlden coming in fourth.