Just bought a 06 Monte LT, Im just looking for some suggestions on what I can do to get the street cred up? haha. Im starting it all off by Tinting the windows obviously, let me know what are some things you would do if you were in my shoes.Let me see some pics of what you got

 

vanilla romma air freshner!!!

but you can also look in ot some wheels for it if ya like it.

better stereo system

after market speakers.
Alarm

 

I'd flip this. Alarm first, then good stereo.

Mufflers =Flowmasters - 40 or 44's.

A cold air intake will actually help this as well.

 

Aftermarket wheels. I prefer 5 spokes but that's just me.

Post some pics of your car for us when you can.

 

A 2006 LT could come with the 3.5 at 210 hp or the 3.9 at 242, can I ask wich you have? Some of my calculations below are assuming you have a 3.9, subtract 30 to get more close to the numbers for a 3.5

Intake.... Exhaust..... Noone makes a true CAI, so you're currently stuck with buying a cone intake that's in the engine compartment, or a drop in stock replacement filter. That's what I have currently, and it did seem to help somewhat. Exhaust, only place that makes a cat back is Magnaflow. You're talking about 900 to 950 shipped. I would pair this witha High flow catalytic convertor myself... A computer retune should definitely help.

After that? They make "wet" nitrous foggers that spray fuel and NOS to gain up to 75-100 HP, but you do this at the risk of your transmission. The SS's have 303 HP and have a upgraded trans to take the abuse... You won't. I mean a good intake and exhaust and you'll be knocking at 255.. a retune? possibly 265-275... That's getting into heavy duty territory right there. The old supercharged 3.8's with 240 hp and 280 TQ also got the upgraded HD transmission. I assuming mainly because of the heavy increase intorque, but that's food for thought.