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Vehicle Info NeededHOLLEYPART NUMBER: 510-21-2BK
21-2BK Middle Belt Installation Kit
$16995
Ships on Sep 03, 2026
Lowest Price GuaranteeGM Gen III/IV LS, Gen V LT Engines
Middle Belt Installation KitBelt Alignment Commonly Used on F-body and GTO Black Finish
Holley 21-2BK Features:
Installation Kit, LS Acc. Drive Brackets, use with MIDDLE belt alignment (alignment common on F-body & GTO)Holley accessory drive installation kits provide proper spacing for Holley A/C, P/S & Alt accessory drive brackets, so belts ride at the perfect distance on your particular engine.A Fitment And Required Components Guide helps you locate and source components and provides other notes and helpful hints to figure your distance. Three easy steps will get you going. Step one is to determine your belt alignment based on your crank pulley position on the engine you have. Step two is to choose the Holley accessory drive brackets that you need (A/C, Alt & P/S or both). Step three is to see which Holley installation kit your set-up requires to line up your accessories with your crank pulley position. An application specific installation kit (part # 21-1, 21-2, or 21-3) is REQUIRED for most applications.Part TypeAccessory Drive Component Mount
BrandHOLLEY
Package Height2.9
Package Width7.3
Package Length16.0
Weight3.48 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part Number21-2BK
Package Qty1
Package TypeEA
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