Im new here and I have just bought a 1999 Grand Prix GTP for my wife. This is my first forced induction car. It has 156,000 miles on it. I just bought NGK irradium plugs and stock replacement 7mm wires (the car is stock...for now). I know these questions have been asked before,
1.)what is the gap suppossed to be (or what do you recommend) on these plugs?
2.)do i need to transfer the metal sleeves on the current spark plug boots to the new wire boots?
3.)how often and how do i change the supercharger oil?
4.)what are some good cheep/easy upgrades for better performance/fuel mileage?
5.)are there any tips or recommendations you guys can give me to take better care of our GTP(is there anything special that i have to do to keep this car running and performing at its best since its supercharged).
6.)are the thrasher intakes any good? (i might be able to get one for free, i just need to swap the stock air box off of our car to a Bonnevile SLE)
7.)what catback exhaust or mufflers do you guys suggest for a good deep tone? (i dont want it to sound like fart cans like a few Grand Prixs I have heard)
Thanks in advance for the tips and help. I know that there were a lot of questions.
