Check out the specs for the '07 ION. Too bad that this was the last year for the ION. Seems that the specs for the 2.4L GenII black, Cylinder head, ECM, and exhaust manifold are shared to the 2.2L. "For the customer, the result is more efficient cooling, more strength to accommodate additional power, as in the new Ecotec 2.0L direct-injection Turbo (RPO LNF) and better noise, vibration and harshness control." Hmm, I like the part about "more strength to accommodate additional power". [url]http://media.gm.com/us/powertrain/en/product_services/2008/Whats%20New/Ecotec/08_L61.doc[/url]