These are Borg Warner numbers from Oreilly's, for the crimp style ends. They can be cross referenced. 4ga- bh17 + or - 1ga, and 2ga- bh55 + 1ga, and 2ga- bh56 - 1/0- bh31 + 1/0- bh32 - 2/0- bh33 + 2/0- bh34 - 3/0- bh35+ 3/0- bh36- 4/0- bh37+ 4/0- bh38- Login to read more.