spark plugs?
 

just got 10mm leads and went for 7 instead of 8 heat plugs is this right got irodium plugs its for a fairly standard uk2000

6 or 7 will be fine.

6's fine on a standard car 7's if running over 1.2/1.3bar although from my experience 7's don't seem to last as long

ok cheers they are ngk irodium ones so will see how they go not going to be running silly power id like to get it to about 280 bhp