i just bought a set of NGK Iridium plugs for my 02 stratus 2.4L, and when i compared the stock to the new, the ngk were much longer than stock. I think the stock ones are 14mm and the ngk are 24mm, will this cause any harm to the motor???

 

If they fit it shouldnt, but make sure the are not touching any "hot" areas or you will be buying a new set.