Acura & Honda Acura & Honda-L15B( GEN X)Bore:2.874 CH:1.031CR:10.3Pin Size:0.787 Acura & Honda-GK5(L15B) Bore:2.874 CH:1.031 CR:12.5 Pin Size:0.785 Acura & Honda-GK5(L15B) Bore:2.874 CH:1.039 CR:13 Pin Size:0.787 Acura & Honda-GK5(L15B) Bore:2.913 CH:1.031 CR:12.5 Pin Size:0.708 Acura&Honda-K20A/A2(NA/TURBO)Bore3.386CH:1.181CR:11.5Pin Size:0.866 Acura & Honda-K20A/A2/A3(NA/TURBO)Bore:3.386CH:1.181CR:9.0Pin Size:0.866 Acura & Honda K24 w/K20A/A2(NA/TURBO)Bore:3.425CH:1.181CR:11.5Pin Size:0.866 Acura & Honda K24 w/K20A/A2/A3 (NA/TURBO) Bore:87mmCH:1.181 CR:9.0 Pin Size:0.866 Acura & Honda-H22F22Bore:3.503CH:1.181CR:9Pin Size:0.866 Acura & Honda-B16ABore:3.307CH:1.181CR:8.3Pin Size:0.826 Acura & Honda-B18A1/B1Bore:3.189CH:1.181CR:9Pin Size:0.826 Acura & Honda-NSX C30ABore:3.563CH:1.184CR:9Pin Size:0.866 Acura & Honda – D16A6Bore:2.953CH:1.163CR:9Pin Size:0.748 Acura & Honda – F20CBore:3.425CH:1.131CR:8.4Pin Size:0.905 Acura & Honda – F22CBore:3.425CH:1.131CR:9Pin Size:0.905 Acura & Honda – H22(sleeved block only)Bore:3.425CH:1.22CR:9Pin Size:0.866 Acura & Honda – K20A/A2Bore:3.386CH:1.181CR:11.5Pin Size:0.866 Acura & Honda – R18Bore:3.189CH:1.135CR:9Pin Size:0.787 Acura & Honda – B20 or Sleeved B18 Block w/B16A or B18C HeadBore:3.307CH:1.181CR:9Pin Size:0.826 Acura & Honda – B18 Block w/B16A or B16C HeadBore:3.209CH:1.181CR:9Pin Size:0.826