Quote Originally Posted by Njobe
i was reading one of the reviews for NGK Iridium Spark Plugs and i saw this: Reviewer: Mitch (Knoxville, TN) These are some good spark plugs. I picked up a few MPG since my old ones had a lot of miles on them. I also think they added about 40whp, but I could be wrong. CRSX had quick shipping and a great price.

I put NGK Iridiums in my Tib and they did nothing for horsepower until I put the NGK sticker on the window. Then it was +20whp baby!! w00t!!