High Output 400A large case BILLET alternator for 2001-2007 GM truck 6.6l Diesel - side output stud - PURPLE Installation Notes: This unit comes equipped with a smaller 1.75 inch diameter alternator pulley, and will require a slightly shorter drive belt for proper belt tension. Not recommended for sustained use above 5,000 RPM engine speed. The Elite... MSRP: Was: Now: $699.00 add Add to Cart favorite_border remove_red_eye