pairs of cylinders (L4 with 3 main bearings, L6 or V6 with 4 main bearings, or V8 with 5 main bearings - two rod journals between main bearings).

In some older engines (such as the Chevrolet Gen-2 "Stovebolt" inline-six, the GMC straight-6 engine, the Buick Straight-eight, and the Chrysler "Slant 6") the bore pitch is additionally extended to