saw this on Fleebay the other day, and noticed they had several sets available.

anyone looking for a set of Delco C86 they have them, but have to buy them in box of 8, so you would have 2 spare :) and $20 shipped in US is not that bad. $2.50 each.

PACK OF 8 - AC Delco Spark Plug # C86

I bought a set and had them in 2 days. they are AC C86 as pictured, i got a 8 pack box with 8 individually boxed plugs with washer.

I'm curious as to where were they made.
I ordered 6 of these >>> C87 Spark Plugs on the off chance they weren't made in Mexico.
These turned out to be made in Japan so I was relieved but not as relieved had they been American made.
Delco was always my manufacturer of choice but they stopped making every plug I had use for years ago.

Were they marked AC? The picture and description sound like they are Denso, replacement for C87.

Dave

I went out and looked at the box i got of the C86 i got, they are marked ACDelco C86 in green, and the boxes are marked Made in Mexico. also looked at the set of C86 i bought years ago and they are also Made in Mexico, then looked at the box of C87 I have that i have been running in the 1930, they are marked Made in China :( as are the spare set i have on the shelf.

here are photos of the items i bought off the link above:

A Few Shots of the Actual Plugs in the Box:

I was curious about Craig's post on the Denso.

After AC stopped producing their own plugs they contracted with Autolite to make the conventional plugs. Autolite had a factory in Mexico for many years and their quality was good in my opinion. In 2013 Autolite moved production to China and I have not run any of those to know how they do.

Dave

Dave,

yeah i figured that after i posted, sorry

the C87 that i am running in the 1930 and ran in the 1929 before tear down were the China C87 seem to do fine. the 1930 has been running the same china C87 for about 5 years so far.

I'll try to remember to take a look tomorrow.
I know the boxes are/were (I probably threw them away) blue and did not say AC but I believe the plugs carry the AC logo.

Sorry I didn't get back sooner.
You are correct.......they are Denso plugs.
I would buy them again in a heartbeat.

Thanks, Denso is a good plug.

Dave