These VTEC Conversion Dowels are perfect for the person that is using an LS/VTEC or B20/VTEC. No more need to drill and ream the dowels holes on the head or block for alignment. - Simply install these VTEC Conversion Dowels for perfect alignment of any B-series VTEC head on a non-VTEC block. ( Some minor modification to the headgasket may be required. Modification not neccesary if using a Golden Eagle Mfg. head gasket. ) - Sold in pairs. - Hard anodized for long life.