huh, I thought they were the best. I had a set of ngk's (not iridium) and the bosch gave me more throttle response. Now I am having problems with the top end, I thought it was because my timing was too far advanced, but that makes sense, because I didnt change the timing after I put them in, and it just started happening recently.

 

if you gap them waaaay down like .035 , you can verify it. if it runs good i'd change them.

 

I just used my g-tech, the horsepower drops at 3500rpm. I'm changing my plugs. The car ran a 16.08 @ 87. I cant wait to get my gears, and now plugs. So Ngk iridium you say? are they more money than regular plugs?