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LS Accessory Drive Bracket - Installation Kit for Long Alignment

Black Installation Kit, LS Acc. Drive Brackets, use with LONG belt alignment (alignment common on Trucks & '10-UP Camaro)

PART# 21-3BK

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$153.00   Suggested Retail
$123.26   Holleydays Price
Estimated shipping date: 01/04/2021
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Installation Kit, LS Acc. Drive Brackets, use with LONG belt alignment (alignment common on Trucks & '10-UP Camaro) 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.


Accessory Drive StyleHigh Mount
Belt AlignmentLong
Emission Code5
EngineGM LS
Product TypeAccessory Bracket
Thickness1.589" Drivers Side
2.119" Passenger Side
WarrantyLimited 90 Day
Part Number21-3BK



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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