Does anyone have information about the Summit Racing SUM-240042, 42 Lb fuel injectors ? I bought a set of these (SUM-240042) on 14 June 2010 from Summit. I have been told these are the exact ones Holley is now supplying with their new MPFI systems. The question I have is this. I'm not sure to use the OLD Injector or NEW Injector Off Time data from Holley's data sheet for their fuel injectors. Since I bought these injectors 14 June 2010 they could be the old ones or the new ones I think. Holley data sheet states that 42 lb Injectors sold with HP and Dominator systems(2010+) are the new injectors. The same Holley data sheet states that 42 lb Injectors sold with Commander 950 Systems (up to early 2010) are the old injectors. I am running a much older Commander 950 Pro with all the updates. How can I determine which ones I have ?