Join Date: Feb 2009
Location: Arlington, VA
Car: 2001 LL Bean, 1997 2.5L 5spd
Feedback Score: 0 reviews
The H6 specifies the NGK platinum plugs. Expensive, but I wouldn't mess around with anything else. Seems any time I've tried a non-spec plug I get misfires.
I replaced my plugs when I had the engine out of the car, so I'll be interested to hear how it goes for you. For the rearmost plugs, you may have to disconnect the engine mounts, jack up the engine, and shift it sideways. There's hardly any clearance back there.