Unmolested 88 vert. I had a set of 4 new plugs, lost one, dealer said "leading or trailing?"
So I have to look at new plugs and see which one is missing. T or L to make up the set
This is my first FC, does it matter, and does the L go top or bottom hole?
Cheers,
Mike

 

Leading lower..trailing top.. it says on the housing

 

Two Leading - (NGK) BUR7EQ
Two Trailing - (NGK) BUR9EQ

 

Can get them in regular Auto parts stores as well.

 

This was the best way I found to remember them....

 

Just simplify it like I do, T-for top plugs and L-for low plugs. Hope it helps.