Warning: I have just pulled a set of NGK Iriway copies out of a Subaru. Thought they were the coilpacks causing the misfire and detonation.

These are selling for under $15 each locally. Will not mention names but please don't cheap out on the spark plugs. Saving couple T dollars in exchange for a damaged engine is not worth it.

Always ask for proof of manufacture.

Cheers,
Mao