just bought my dream car, but need help

What exhaust system do you have on there now?

Magnapacks will make it loud and add some power or if you want that deep muscle car tone go with Flowmaster, the 2 chambered muffs will be louder.

Nitto NT-555R Drag Radial is one of the best tires, you should hook up with no problem.

First off, I recommend this: Go get a dyno done on the car. Find one where they can monitor your a/f mixture, check timing, and make sure the car is safe. If you don't know when the plugs were changed last, change them now. Most likely they are gapped around .032 or so. Plugs will need to be checked and changed regularly.

Not sure if you know all this stuff or not so I'm just giving you a heads up.

Now, for traction. What gear do you have in the car? You will want some Nitto drag radials at least. Size depends on what wheel you have. If it's stock you will want 275/40/17's. They get about 15-20K miles out of them, depending how you drive. Now if you have a 4.10 gear or more out back, 1st gear will go up in smoke regardless in most cases.

Last thing I can think of. The car has traction control. NEVER have it on if you plan to get into boost. If you hit boost, break traction and the traction control takes over....say a prayer that your motor stays together. I installed a default module so that when I start the car it is OFF from the start. I never turn it on.

How do you know it's off? Tell us what RPM you are at doing 60mph in 4th or 5th gear and I can tell you what gear you have.

If it's stock exhaust, a catback will give you the sound you want. Don't just weld in mufflers. You will benefit a lot since it's already blown. Flowmaster is traditional muscle car sound...it's what I have and love it. The other one I would recommend is Magnaflow...2 buddy's have it and it sounds nice. If you want it loud, then you will need an off road (no cats) aftermarket mid pipe, either H or X.