go to INTENSE-Racing.com for the FWI intake system, its only $170 or so and comes with a K&N cone filter.
DO NOT GET BOSCH ANYTHING, WE HAVE HAD TERRIBLE EXPERIENCE WITH THEM. DO NOT GET BOSCH ANYTHING. I'm not sure if anyone has tried the fusion series but please just get a 1 heatrange colder copper plug like the TR55s or equivilant
Wires: go Belden (from napa) or go home. Several others are ok, but the beldens hold up great and have a lifetime warranty.
Pully - I run a 3.4" on my 98 SSEi with 0* of Knock, this is hard to achieve unless you have replaced EVERYTHING tuneup wise AND
have a scantool, I run the aeroforce in my dash (2" scantool that does everything) in place of where the front cig lighter was. Read my thread in DETAILING about engine bay cleaning and that lists everything I have replaced as far as Pre-mod steps.
You have a 3.8" pulley right now, without a FWI, I would not go below a 3.6" pulley. Gutted airbox you may be able to go smaller but I do not have experience with that.
I'd reccomend the following sites for parts on your car:
I have done business with both and was 100% satisfied, INTENSE has more parts that are suited towards bonnies, check out the LEVEL 1 kit for your car...Just over $400 and comes with everything you need.
Let me say it again. Before you think about a smaller pulley, make sure you do a complete tuneup (everything) as well as either purchase or borrow a scantool capable of scanning for knock retard or KR for short
KR has the potential to do serious damage to your motor if you are not careful, however with the proper supporting mods you can get away with a 3.4" pulley with 1* to 2* of KR max at 75* F. keep in mind there are members in the Northeast part of the country with either laptop based scantools or handhelds...I think there are anyway.
Finally check out my thread on my 98 SSEi here, in Performance and Brainstorming:
Lets keep in mind I did display my opinons in this post, some members may disagree with the fine points but hey its a forum right? I may be impartial toward certain brands but please do not get bosch, personally I have had a lot of problems with them on 2 different cars.