Welcome Aboard!What do you mean by tapping straight into vacuum line?
I'm not sure where you get the idea that these are junk. Look at Forge's website, they make a lot of custom parts. They might not be HKS, AGP or [insert name brand here] but IMO it's a quality product that simply needs a different set of springs specifically for the cruze. The product is solid, nice looking and isn't hard to install.
Anyone who knows anything will know right away what the noise coming from under my hood is.
I'm still going to try the yellow spring with a direct tap into vacuum and see what happens.
You do realize this is a seven year old thread right?
Don't forget to introduce yourself and your Cruze here.