Quote Originally Posted by lwrs10 View Post
I wanted to add to this tread, as there is some very good info in here.

The 2004-1007 Ion Redline and Cobalt SS used the P12 PCM and were 100% 58x. I am working on an E67 swap for my 2007 right now, and verified the reluctor wheel is 58x at a local machine shop where one of these motors is in for work. I had it in my hands, and it is not a 7x.
This was brought up to me a few weeks ago as well, unless the P10 is 58x as well (doubtful, was released in 02 and Ive seen 02-05 I6 reluctors, they're 7x) then it means at least the 06 P12 can run BOTH 7x and 58x setups. It is OS dependent at that point, the I4/I5s were either all 58x or the Atlas engines were 7x and the Cobalt/Redline ones are 58x. I know for a fact the 06 P12 can run an 02-05 I6 which is 7x using the TB/Voy OS.