Subaru LEGACY 2002 Quick Reference Index page 267

2. Spark Plug
The spark plug has a platinum tipped electrode. The thread diameter is 14 mm (0.551 in) and the
gap is controlled to a value between 1.0 and 1.1 mm (0.039 and 0.043 in).
(1) Platinum tipped electrode
(2) Gap : 1.0 – 1.1 mm (0.039 – 0.043 in)
SPARK PLUG
(2)
(1)
IG-3
Ignition
B2H3979B