I was looking to see which spark plugs to order. The ones I have say Autolite 25 on the spark plug. Is this the same thing as these:

http://store.summitracing.com/partdetail.asp?autofilter=1&part=FRM%2D25&N=700+115&autoview=sku

fram makes autolite. so i guess that's the frm prefix with the summit number. i'd guess it's the same. autolite #25 is the equivilant heat range and thread sizes and such of the a/c r44ts plug. hope it helps.

Yes, that's the Autolite #25.

For street performance I start one range colder- the #24. Same plug bot one heat range colder and the outside ceramic part is significantly shorter- can help if plug clearance with a header tube that's tight.