I'm no expert, but as Jim says, a mild port and polish usually helps any engine. I don't think the $1400 would be worth it on the n/a though, you probably would not see more than 10-15 hp from it, if that (just a guesstimate). ask kinger what the gains are expected to be for your application. Stuff for our cars is too darn expensive! I'm gonna go buy a Honda or a Mustang, see ya later.
