I seen a 2.4 intake kit for the 05-07 cobalts that is said to increase horsepower by 13.12hp. Anyone have any luck with them yet. If not I might try one out. its only like 250 on that website. not bad for a 13hp upgrade.
You need a tune to benefit from it.
Thats what I have been told and in the tuning forum I asked around and I guess It would take alot more work than expected. I just figured it was worth a try. Its also hard to find someone who could tune for me.