I bought a bunch of bpr8es from ebay and I noticed the colors were different from my other bpr8es / bpr9es. Ones silver and ones like a copper color. Any insight on this?

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i think the upper caps screw off on the copper ones

 

ok thanks, so no difference spark wise then?

 

the copper has threading at the cap and the silver ones solid. i just checked. i wonder what the reason behind that is?

 

No difference except the heat range of the plug.

 

Why would 2 brp8es plugs have different heat ranges?

 

They won't.

 

one of those plugs in the pic (silver) is a bpr9es actually. im not so sure how WickedIXMR knew the one was a bpr9es tho?

also so im not confusing anyone...... my other bpr8es are silver as well, thats mainly why i started this thread. ive never seen
them copper in color before. extremepsi ones are all silver. but im guessing the silver is just a coating overtop of the copper ?

 

I assumed that because you said "bpr8es / bpr9es" in your first post.

Maybe one day NGK felt like making them in silver and another day in a brass color. Who cares.

 

ok thanks for responding guys. I got my answer