Would it work?
 

http://www.ebay.ca/itm/FOR-COBALT-HH...vxp=mtr&_uhb=1

I'm not that familiar with the variations of the 2.2l ecotec from the alero and the cobalt. My question is: would this header work? This one seems better with the coating rather than the stainless steel with a ton of welds.

Our motor is a l61 and the other code is for a 2.4l ecotec...it should bolt to the motor the only thing to check is clearances between the motor and the firewall as the different cars have different amounts of space, i think you should be fine though

This. A lot of the J-body guys run the LSJ pacesetter headers on their Ecotecs. People are gonna say that they're junk, but the J-body guys seem to prefer them.

I'm looking at getting the pieces together for a complete exhaust, but I want it to be as quiet as possible.

1. vibrant ultra quiet resonator
2. walker quiet flow muffler

highest flow with the lowest sound

my exhaust is 3" the entire way and quiet.

^^ I like the sound of this. I'll look into it, thanks.

So this is pretty much all I would need for the exhaust other than pipe to connect everything?

http://www.ebay.ca/itm/3-Magnaflow-U...-/110847989857

http://www.summitracing.com/int/part...1054/overview/

http://www.amazon.ca/Vibrant-1142-Ul.../dp/B001806YE2

http://www.ebay.ca/itm/Tsudo-02-05-C...vxp=mtr&_uhb=1