2005 Pontiac G6 Bore: 2.375 In.; Position: Front;. 2006 Pontiac G6 Bore: 2.375 In.; Position: Front;. 2007 Pontiac G6 Bore: 2.375 In.; Position: Front;. Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience.