Hey --- listen to MX-5 ... he knows what he's talking about... my dealer also said that the dp plugs were nothing but trouble and that they are longer ... they actually showed me (they ARE longer, but only on the ceramic portion) ... since the spark is closer to the combustion chamber, the flame front is better, thus smoothing out the explosion (right MX-5?).
I just put them in and I love them, what a difference (and remember to TORQUE! - LOL
)
pingber