Product Description: LS F-Case Low Mount Alternator Bracket for Camaro Belt with Clearance Comes with rear alternator bracket and idler pulley Can only be used on blocks with at least 2 mounting holes. If you have a block with only 1 M10 hole, you will need to drill and tap the second hole M10-1.5mm You will need a factory 1998-2002 LS1 Camaro belt to complete this kit. If using a 145 or 160 amp truck alternator, a 3/4 inch longer belt will be required.