spark plug gap
 

i have a stock 1990 mustang gt and i want to know what is the propper gap for it i was told .54 and .50 but i would like to make sure what is the best gap to gap it thanks.

yep somewhere right in there..

.054 should be factory

0.054 correct for that year 5L Mustang, but I always gapped mine at 0.050 on stock applications...

could you lose power if their gapped smaller idk like .035:o

^^
good question

i would think so. u might not get the proper combustion in the cylinder. i always gap mine at .052