Oem spark plug part number

I keep finding 2 of them which one is the correct one. 90919-01287 vs 90919-01263

This will be for 2018 v6

 

When I look at Sparks Parts description of each of those, bottom of the paragraph for 01287 says 2.7L, bottom of paragraph for 01263 says 3.5L.

For what it’s worth I ordered 90919-01263 for my V6, but I haven’t installed them yet.

 

I don’t know what the Toyota # is but here is what the manual says.

 

Just did mine yesterday. #FK20HBR8. Also a '18 3.5, I admit i did it early at 40k. My plugs looked fine yet, and all were still tight. Wanted to do it in case there were any loose like we've heard about. Took maybe 1.5 hrs from getting tools out and a fender cover on, until all cleaned up. It's fairly easy, just exercise patience and care unplugging the coils and any sensors involved.

 

I bought my 6 Denso plugs at Auto Zone. The Auto Zone product code is 3491.

https://www.autozone.com/external-engine/spark-plug/p/denso-iridium-spark-plug-3491/533161_0_0