I am looking to buy some new spark plugs. What do you guys suggest for a X? I have minor bolt on's. Intake and straight pipe exhaust.

 

Platnum ngk iridium ... Oem

 

Most people in the Subaru community modded to NGK "step colder" plugs when they tuned their cars, is that true with Evos too?

 

Yes

 

I just got hold of my tuner and he is saying that I should use NGK part number ILKR8E6. This may help anyone else out there that is looking for replacement plugs too.

 

I just got a set of ILKR8B6 They said these came off the 2013 Evo GSR.

 

stick with the oem one!

 

Stock turbo, near stock boot - OEM or NGK R2556B-8
After-market turbo - NGK R2556B-9

 

One that's new and gapped correctly. NGK.

 

are the NGK part number ILKR8E6 pre gapped? or do they need to be gapped? if they need to be gapped whats should they be gapped to?

 

DILKR8B6 might be better due to dual tips. For high boost E85 racing NGK plugs would be better since they less prone to make hot spots (because of non protruded tip). For DD it might have more troubles starting and it's hard to gap them without damaging the tip.

 

If you haven't had any issues with the stock plugs...i'd just get another set of stock plugs.

 

Both are stock plugs. DILK was coming since 2012 if I remember correctly.

 

Stock OEM NGK's.