Denso Iridium Spark Plugs

yah so the biggest bitch of installing them wasn't gapping them that was cake..... it was the fact that i broke a freakin bolt on my strut bar and after i took it off i put the plugs in i had to drive it to Sears to get a replacement bolt n e ways... my impressions of the Denso Iridiums:  before installing them it was really cold out the few days before and all of you guys with in takes and the resonator removed know how much better our car's feel when its cold out n e ways i installed the plugs and that day the temperature went from 37 the previous 3 days to 68 that day so i didnt get to judge them that well..... but tonight it got cold again and i noticed a DEFINATE power increase caused by the plugs im chirping off the line (it's an automatic) and my car didnt do that before... and the high end feels smoother and definately a little bit of a bump in horsepower was acheived.