Just finished a major tune up on my FJ80 Toyota Landcruiser and got talked into buying the almighty "4 Point Bosche Platinum spark plugs" pre gapped....Needless to say they were the most expensive plugs too at like $9 each... Finished the tuneup expecting to feel a little more power but instead it was the opposite... I changed the cap, rotor, plugs wires, air and fuel filters, cleaned the TB, synthetic oil and filter changes, cleaned the injectors, etc... Cranked it up and noticed an immediate power loss even though it ran a little smoother....
After being disappointed I said to myself it's got to be the plugs, I immediately reinstalled my fried NGK plugs and the power was restored....
I think I will be going back to the Kragen auto parts tomarrow to get my money back for the greatest plugs on earth...Yeah right!!!!
Fair warning stick with OEM, NGK, or Denso plugs and stay clear of the 4 and 2 point plugs because they are crap....