I have an Injen intake for the colbolt and it fits without a problem but it throws a lean code causing the car to shift really hard and if it is cold the shifting is all messed up. The way to fix it is to buy a tune for it and it is said it will fix it. I'm in the process of getting to tune. The G5 G6 Colbolt Sky Solstis will all fit but will throw the lean code.