It differs for every vehicle. My best guess if you did everything I listed above along with a 3.5 pulley assuming your not getting KR, you could be looking at gains of around 30hp at the crank. The exhaust and intake work isn't going to net you a whole lot in hp, those are supportive mods that will allow you to start on the mods that really gain you some power like dropping pulley sizes.

Alrighty, sounds like a plan then

a tune is really necessary to run all these mods to their ut-most potential

First off, welcome to the forum, You sound a lot like i did when i first started here, you just wanna know what you need for one mod and thats it. However its important to understand every mod depends on a bunch of other mods in order for it to perform properly and at tip top condition. So just as a word of advice, take the time to surf the forum and ask questions, learn about the risks and advantages to the mod/mods you wanna do, and in the process you'll even learn to do a lot of things yourself. this means alot of saved money for you, in that you learn to maintain your own vehicle and up keep the mods you perform. But i agree with one of the earlier post, make sure your car is mechanically sound in all other areas before you throw any more power into her. you've got a 13 yr old bonnie, make sure she'* healthy.

Well I just had a motor put in it and it has 48-50k on it, i change the oil and spark plugs in time and make sure everythings good

Sounds good. Hows your suspension, the braking, the transmission? I dont want to seem like im prying but there are plenty of guys that jump the gun and add extra boost before they cover basic fundamentals, and that can be costly.

Suspension is one thing i do need, any suggestions? Transmission is in good shape, shifts right on time, and smoothly, brakes are also in good shape

has the trans fluid been changed recently, you can also install a $5 DIY shift kit if you want to to firm up the shifts

The stock suspension in these cars isn't bad at all. It tends to get a little squirrely when you really start hitting really high speeds but other than its coo. I'd say find out whats wrong with your suspension and just get it fixed. But other than sway bars on the strut towers their reaslly isnt too much you need to do. If i missed something here anybody else feel free to jump in.

Is there any aftermarket struts and springs?