Spark plugs for headers
#2
Can't speak for their plugs but their coils suck they do not last I have had several. I try to run AC in GM street motors. I have NGK in my race motor I may try AC next time. Need more details on the motor if its a dome piston motor you will need non project tip plugs if you have aftermarket heads they may have came with a recommendation to get you in the ball park as far as design and heat range goes. The NGKs in my 383 sbc are about 7 years old. I know I need to change them.
#4
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Join Date: Nov 2009
Posts: 267
Autolite AR Racing plugs AR33 thru AR35 depending on heat range needs.
they are shorties to clear headers on both straight plug or angled plug heads, non-projected tip, and really good quality. I have had only one plug failure in over five years, and change them out once a year at beginning of season, just because... and race hard at dirt circle track every weekend thru the summer. You can probably get them from a local parts store, but I order mine through online speed parts outlets. Jim
they are shorties to clear headers on both straight plug or angled plug heads, non-projected tip, and really good quality. I have had only one plug failure in over five years, and change them out once a year at beginning of season, just because... and race hard at dirt circle track every weekend thru the summer. You can probably get them from a local parts store, but I order mine through online speed parts outlets. Jim