What is the part # for ngk spark plugs for the 2.2 engine? I want to get a lower heat range plug and the auto parts store needs me to give them a exact part # so I can get what I want. They dont know what I am talking about when i say "lower heat range"!!!

The following applies to our 1993 Legacy 2.2 Liter and should be the same for your 1990:

NGK V-Power plugs

Stock temp range: BKR6E-11

One step hotter: BKR5E-11

One step colder: BKR7E-11

 

NGK's numbering system goes up for colder, and down for hotter. It's a little confusing.

 

Link:

http://www.ngksparkplugs.com/tech_support/spark_plugs/p2.asp?mode=nml

Decoding NGK's numbering system:

http://www.ngk.com/sparkplug411_manufacturer.asp?manufacturerID=1