Wilwood 140-12100-BK 54 REAR CALIPER KIT - BLACKWilwood 140 12100 BK 54 REAR CALIPER KIT BLACK Wilwood's D154 Front Caliper Kit is a direct bolt on 1 or 2 piston, lightweight, high strength, extreme duty alternative to the OE cast iron "Metric" calipers that were used on a wide range of factory disc brake equipped mid size GM cars and small trucks beginning in 1978. Use of this caliper can still be found on some GM models as late as the year 2002. Forged billet aluminum bodies, stainless steel