i read some of the comments about the plugs and i wanted to make it clear that im not expecting a huge hp boost. i heard they were good plugs from a buddy of mine who is into imports and has a FAST modded prelude. i figured at $40 if they only last 60k and dont even give additional power then they were worth the money. but i dont want to put anything in my engine that will screw it up either. id rather cut my losses now.