Intake and Exhaust Questions (upgrading) Options

[MyFirstCar]

I have a 94 GT and if I ever decide to do anything about increasing the performance, I will install an intake and exhaust system. But I have a couple of questions about both.

Intake: Are there intakes available to buy where I will not have to move anything in the engine to install it? And I see this term "forced induction," it that a type of Cold Air Intake or it that term related to a turbocharger? If anyone could give suggest a company to get it from (I was thinking K&N but it didn't seem they had any for my year celica). Or would it be better to get a SRI?

Exhaust: Say I was to get a cat-back exhaust system, what size should I get? Also, if i got a BIGGER exhaust, would it be a good idea to increase the size of the downpipe to that same size (if thats even possible) or should i just leave it alone?

Sorry for all the questions, but I am trying to learn as much as I can. Oh... and please don't give me any crap about how little horsepower i'll get. I'm doing it for the experience of working on my car. I was considering about using that honda accord intake but not sure whether I should try to mess with that.

This post has been edited by MyFirstCar: Apr 30, 2008 - 12:25 AM

[DEATH]

Myfirstcar - Sounds like you got the right idea. You seem to have researched these two things pretty well and you have weighed the options vs practicality and that's good. Now get the Accord CAI like the one above and get started. You can make an SRI/CAI where during the summer months you will use the whole thing and during the wet/winter months you will remove part of it and install the filter in the SRI fashion. You will just need to make an additional cut and get another coupler from Autozone w/e. Truthfully there is almost no gain from a CAI other than it looks cool [above an SRI that is - you will get some gain over stock intake - how much that is? Who knows but you will def feel an increase in throttle response and on the butt dyno so do it]. Notice almost none of the Turbo guys have CAI yet we all have 3x the piping a CAI does - that should tell you something.
As for DIY or premade - I say do it yourself. Get the one njccmd2002 showed you. It's cheap and there is a very detailed how-to on this site that will walk you through it. If you can use basic tools and a hacksaw [or are wlling to learn] you can do this.
For exhaust - a 2.25-2.5" diameter catback will do you fine. This should be the next mod to do after intake. Then I'd get a full NGK setup: Spark Plugs [at least platinum], Plug Wires, and OEM Cap and Rotor. Then, if you live in a state with no emisions testing, get yourself the ebay header and a Magnaflow Catalytic converter and get them installed.
This setup will make the car very fun to drive.