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I was told to buy BKR6E-11 spark plugs (oem in 99-00 si's) for my high compression (11.0:1) D16y8 build. They seem to be a bit shorter than the ZFR4F-11 plugs (oem for the y8). Anybody use these plugs in a y8? If anyone has oanother recommendation, please let me know. How is that heat range, for a high compression D on pump gas? I posting the question on honda-tech, and it's hard to get any "tech" related info on that sight.
Thanks in advance for your help!
 

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First question: Why would you want to, it's still a heat range 11 plug.

Second question: For your setup, yes.

Just try to source some 10's for your application.
 

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DOH, I got bad info somewhere along the way. me> :hammer: <ownage hammer

Either way, that's what I meant: run 1 step colder.
Just to help a lil more. NGK is backward compared to other companies on the heat ranges. The lower the number the hotter the plug. The higher the number the colder!
 
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