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Spark Plugs 1800

Roy,

IIRC the w7dc are vw plugs. The w7dc have a longer reach, they'll stick into the combustion chamber too far and the exposed threads will create hotspots. Probably not so go for detonation.

Designation Codes for Bosch spark plugs

Technical Resource Library

I'd stick with the W7BC or NGK BP6HS. I've been using the NGK's because there easier to get locally.

much respect,
curtis m. white
thirdchoice






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