Hey brsseb,

I know this may start a debate... But I would stick with OS plugs paying
the little extra for them!! My ex trainer and other club members say there
is little difference.. But I tried a tower plug when I broke-in my LA-46 and
two failed.. Luck of the draw?? Who knows. But I replaced with an O.S. A-3
and it's still in the engine today after about 7-8 gals. of fuel ran through it.