Cylinder Head Assembly: Locations

FRONT TO REAR

CA16DE
Left Side ...............................E
Right Side ..............................I

CA18DE
Left Side ...............................E
Right Side ..............................I

CA18ET, CA20E ...............I-E-E-I-I-E-E-I
E16i ................................I-E-I-E-I-E-I-E
E16S ...............................I-E-I-E-I-E-I-E
Z20, Z24, Z24i ..............I-E-E-I-I-E-E-I