I have an auto 03 GT with 150k+ miles on it. I'm wanting to add a Kenne Belle 2.1L blower on it, likely running around 9psi. Now I know KB advertises that this particular blower can be installed on a stock engine and add 105HP (or whatever they say) but I'd like to hear it from you experienced gentleman. With my car having the miles on it, what would say definitely needs replacing before adding something such as a blower?