Originally Posted by GTEASER
Is it something that an emission inspection would pick up? In other words, before inspection, should it be re-plumbed back to stock?
Nope. Done this on a few cars. No issues with inspection or emissions checks in PA, CT or NY for example. And yep, even well below freezing, never had a problem. Gains? You might notice some on a 2.5GT. No real difference on a 2.5i or 3.6R I can think of.