I bought those and found that they were too big to fit in the E7's. I ended up using a pair of old spark plugs to seal the holes. I just smeared the threads with some sealant and they worked a treat. You can imagine auto technicians scratching their heads when they see 10 spark plugs but only 8 plug wires.
does anyone know the correct thread size on the back of the head.
the how to on the AFM site says 9/16 NC thread.
i can't find a 9/16 thread anywhere locally. i'm sure i could find it on the net, but i think shipping would cost more then 2bolts and some washers. I've tried, all the home depots, the small mom and pop hardware stores which are very few, and all the autoparts store (big name and mom and pop) and nothing. and since i keep hearing that the trick flow ones don't really fit well in non trick flow heads i'm kinda on the fence here.
Like I said in my first post, use a pair of old spark plugs. They fit perfectly. Just make sure you add thread sealant/locker so they won't back out again.
I bought those and found that they were too big to fit in the E7's. I ended up using a pair of old spark plugs to seal the holes. I just smeared the threads with some sealant and they worked a treat. You can imagine auto technicians scratching their heads when they see 10 spark plugs but only 8 plug wires.