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2zzge spark plugs

963 views 1 reply 2 participants last post by  2way 
#1 ·
Thinking of changing my stock sk20r11 for the denso ik20tt plugs. Is it worth doing? What's the difference between the ik20 and ik20tt (except for the twin tip)?
 
#2 ·
Ground electrode material, I think.
 
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