Spark Plugs -Which Ones do you use

I have a typical Lycoming 0320 of 160 hp in my RV-4. It has one normal Slick magneto and one Electronic Ignition in place of the other mag. The electronic mag fires automotive spark plugs which are DENSO Iridium IK27 I have not had much luck in finding these plugs and was wondering if anyone else uses auto plugs and what brand and exact plug in their airplane. I am sure there must be a more common plug that I can use. Anybody got any suggestions.
[email protected]

Lotta good stuff in the archives.

NGK

NGK BR8ES solid cap plugs on the bottom for the Elec. Ign.
One mag and one Lightspeed Electronic Ign. with mini sensor

bhester said:

NGK BR8ES solid cap plugs
...

Click to expand...

Same plugs with my P-mag, gapped to .032.

Don't buy the expensive plugs, just replace these every condition inspection. For less than $20 for a set of eight, you can't go wrong.

Note the comment about the solid cap. They make the BR8ES's (and other plugs) with both a screw off cap and a solid cap, non-removable cap. Get the solid cap.

Ask your auto parts person for NGK BR8ES, part number #3961. They should have the solid terminal posts.

I've not had any problem getting IK27s. I have a spare set but haven't needed to replace the originals.

Typing it into an Amazon search returns several suppliers.

Thanks, I never thought about the archives. I know that you get several suppliers whey you Google this but most of them did not actually have the plugs when I contacted them.
Actually my current plugs are running good but all this got started when I pulled just one plug to look at it and then tried to buy just a new gasket to use in re-installing it. Suppliers think you are crazy when you try to get just a gasket. I know that on regular aviation plugs you should always use a new gasket so why not these also. Anyway I never found gaskets at all.
When the time comes, I will probably switch over to the NGK plugs because I think they will be easier to find.