A 2003 Shadow requires a gap of .031 - .035 in per owners manual
gap at .031 - .035
NGK 5531 gap .036
Spark gap is 0.8-0.9mm(0.031-0.035in)
The gap for the 2.2L and 2.5L is .035 according to the hood label.
0.7 mm
0,7-0,8 mm
.35
35
Spark plug gap is 0.8 — 0.9 mm or 0.03 — 0.04 inches.
.035 inches
.030 - .035