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1″ Cast Block GM
Bison Off Road’s rear block kits are built with what the factory had in mind. Using OEM cast style blocks.
Fits 1988-1998 GM1500 and 2000-2010 GM HD 2500/3500
Fits single Rear wheel only (not Dually)
Drive Train:2WD/4WDUse:Rear 1″:BORGR-1501:GR-1501
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