I'm pretty sure that caliper has two fittings, top and bottom.
So that brembo caliper kit is from a dealer? I know I've seen it for cobalts I just cant find who sells it.
I got my intake off ebay. There are plenty there, and some legit ones.
I cheaped out and got a $75 intake, It's more galvanized aluminum and doesn't look great. It did need a little bit of modification to get it to work but it wasn't too bad. After the MAF it necked down to 2.5" and I think that is to clear the hood. But I replaced part of it and made it all 3" it does rub a little but it works and sounds great!
Especially because all I did was a res delete on the exhaust and it's still pretty darn quiet. It's nice when I get on it
I too have the 2.4 as well. www.ZZPerformance.com
is a great site for performance parts for our motor.
If you get an intake though it will through a Lean Code so you will either need to make sure the tubing has a 2.5" inside diameter around the MAF sensor. or you'll have to get a tune.
I got the WAMS tune, solved all my problems and made the engine a ton better!