Very modified 1600 Flat-4 Kafer engine (also 1100 bug engine was the first engine i uploaded here lul), for racing pu...

A 6 cylinder made from a regular i4 and a 360 degree i2 (or middle 2 cylinders of an i4) welded together. This result...

A 6 cylinder made from a regular i4 and a 180 degree i2 (or half of an i4) welded together. This results in 2 cycles ...