Thread: DZ Spark Plugs?
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Old 04-30-2005, 08:58 AM
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Default Re: DZ Spark Plugs?
Yah Rob, the XR5's are a 3/8 reach gasketed plug with a 13/16 hex. A-ok for a 69 Z28. The UR5's are a .460 reach with a tapered seat and a 5/8 hex for the later stuff.

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