i had a mightmare with the pulse plugs ,went through 2 sets and never got to try them so got a refund.I have ngk platinum ones in at the moment . Was hoping the ebay denson ones were the £50 ones going cheap for £6 ...are bosch super 4 the plugs you said to use if so i cant stand these plugs as u only get 0.4 bhp gain from these i have try them before:rolleyes: