Given that I change my plugs every 15k miles.
Does it matter whether or not I use the platinum plugs?
Given that the BUR9EQP's are $12-15
and that the BUR9EQ's are $4-5
What would be the best performance? You can buy 3x as many non-platium plugs for the same price. Is it better to use the 9EQ's and replace them more often rather than getting the 9EQP's?
Also, i've been told that I might want to run 9's on both the trailing/leading plugs, is this a good idea?
I'm running 12-14lbs of boost on a street ported FD with a high-flo exhaust/intake, 1 extra 550cc injector and a greddy fuel computer.