Caterpillar C11, ECMs, (GOOD USED & BENCH TESTED) Caterpillar C11 ECM Part # 256-1159-01 For Sale, 70-PIN, CAT C11 ECM, KCA Serial Number Prefix, P/N 2561159 01, Also Compatible with CAT C13 KCB, Serial # 19367596JJ, Stock # 8018