From ngksparkplugs.com use TR55
o.39 in
ngk BPMR7A
NGK BPM6A
Make sure you are using Ford OEM (Motorcraft is not always OEM) Spark Plugs that are designed for you explorer.
There are many stores that sell the NGK spark plugs for cheap. However, the store that sells the cheapest NGK spark plugs would be the AdvanceAutoParts site which gives a 20% discount code.
ngk 7134 ngk 7734
NGK Iridium spark plugs are fine for your 1996 Honda Accord.
ngk
Stock NGK plugs are the best plugs. As you raise the boost of the TT model, you can opt for the colder grade plugs but still stick with NGK.
NGK's BR8HS
For plugs that can be adjusted the NGK catalogue states 0.8mm for all engine sizes of 405.
It has 2 plugs NGK D9EA