Hey all,
Ran a search on what spark plugs i should be replacing my OEMs with, and it seems that the general consensus is that NGK coppers are the best.
I'm looking around at http://www.clubplug.net and I'm having the hardest time figuring out exactly what model and what NGK spark plug line people have been referring to. furthermore, the NGK webapp that tells you what spark plug fits in what cars only goes up through MY2001.

Can anybody help me out? I haven't done any engine/turbo mods yet, so I don't need a cooler plug. What is the model#/other code information for the spark plug that I need (MY02 WRX)?

 

well, found the answer to my own question after a little more searching. Did a cross reference on the OEM champion plug.

However, I'm finding that there are two plugs listed on SubaruParts.com
Like i said before, my car is an 02 WRX. What does the 205 and 251 mean? Do i have the champion plug or the ngk plug in my car, and will a NGK-BKR6E-11 (2762) be interchangable with either?

 

that may be...i havent decided for sure what im getting yet. But i do need to know what will fit, and what that 205/251 is supposed to mean.

 

205 = 2.0L , 251 = 2.5L. I have no Idea where the numbers came from, but that is the generalized listing I see in referance to parts that fit particular cars...

Here is all of the cross refferances I can find
The stock gap on a WRX is between 0.028" & 0.032"
Stock heat ranges for WRX:
-NGK PFR6G stock Lazer Platinum <--- factory WRX
-NGK BKR6EVX <--- Perf. Platinum
-NGK BKR6EIX <--- Iridium
-NGK BKR6E <---Copper
-NGK BKR6E-11 <--- Copper wrong gap (0.04x") but can be used if re- gapped...

One step colder for WRX:
-NGK BKR7E <--- Copper
-NGK PFR7G-11 <--- Needs re-gapping, Lazer Platinum
-NGK BKR7EVX-11 <--- Needs re-gapping, Perf. Platinum
-NGK BKR7EIX-11 <--- Needs re-gapping, Iridium

Notes: The Stock plug on a Normally Asperrated 2.5L would be NGK BKR5E-11 gapped at over 0.04x" one step colder on a NA 2.5L would be NGK BKR6E-11.
A platinum plug will last a lot longer than a copper plug, & the WRX tends to be hard on plugs... The service interval on the factory "Lazer Platinum" plug is 60k miles.
The service interval on a "Copper" plug in a NA 2.5L 30k miles...
If you don't mind the extra servicing a copper works... I don't know how long they will realy last though...

 

thanks so much, this is exactly what i need.