Starting in 2006 , they became the only engine manufacturer in the IndyCar Series , and continued in that capacity through 2011 .
Honda also came to the IRL in 2003 , and by 2005 was clearly the dominant engine manufacturer .
Starting in 2006 , they became the only engine manufacturer in the IRL   , and continued in that capacity through 2011 .
Honda also came to the IRL in 2003 , and by 2005 was clearly the dominant engine manufacturer .