Spark Plugs
Senior Member
Joined: Dec 2006
Posts: 43,538
Likes: 817
From: Joplin MO
Whatever the differences may or may not be, they are both the improved plugs with the slightly smaller barrel and the extra cutaway at the tip. It looks like the SP-507 is being discontinued and being replaced by the SP-515.
Senior Member
Joined: Jul 2007
Posts: 2,036
Likes: 2
From: Maine
I'm sorry, you are wrong. The SP-507, and SP-515 are both finewire platinum
plugs, which are single platinum. Only the center electrode is platinum. The
plugs pictured are SP-507, and SP-515 plugs. Look at the number on the insulator (PZH 14F) this
number cross-references with SP-515. With COPs, there is no benefit
to double platinum, due to all plugs having the same polarity spark.
plugs, which are single platinum. Only the center electrode is platinum. The
plugs pictured are SP-507, and SP-515 plugs. Look at the number on the insulator (PZH 14F) this
number cross-references with SP-515. With COPs, there is no benefit
to double platinum, due to all plugs having the same polarity spark.
Senior Member
Joined: Dec 2011
Posts: 443
Likes: 0
From: Durham, NC
I agree with you Takeda, all I was doing was to point out the 'advertised' differences in the plugs, that's all. We kind of got off topic here, but to answer the op question, the 507 and the 515 are the new replacements for the original plugs that came in the earlier 3v's, I don't know when the factory made the change. The original ones that came out of my 07 was the old type with the extended shield which was changed with the new design. An off topic question for you if you wouldn't mind....what kind of camera do you use to get those spectacular photos? PM Me if you want to. Thanks
The closeups photos were taken with a Nikon D300, and a 105mm f/2.8 VR lens. The other photos were taken with a Nikon D3S, and a 24-70mm f/2.8
lens.
Senior Member
Joined: Jul 2007
Posts: 2,036
Likes: 2
From: Maine
