I recently purchased a 1991 Maxima with a 5 spd. the car runs/drives great, although it idles and accelerates a little roughly, which I found out is probably the vaccum lines since theyre cracked and old. I plan on replacing the spark plugs as well. now maybe somebody could explain to me - is getting platinum really worth it?? will I notice an increase in power? do they simply last longer? I keep hearing different things. I want to kind of soup it up, that is, more horsepower/acceleration, but not neccesarily like a street racer. I would like to hold my own so to speak. My understanding is that I need to add a new air filter kit, right? What kind would you all recommend that would be best for this year and the most cost effective? Also (I know this is a lot of questions but I am pretty dumb when it comes to cars) I was researching this product called a "vortec cyclone" that is supposed to increase gas miliage and horsepower. Anybody have experience with these? so basically, what little things can I do (that dont cost more than 300 bucks) that would "soup up" my engine?
Thanks
