Originally Posted by Stevegud1
Did the 42003 work OK for you? I have a chance to buy one for my 2010 5.4, but the new number for Hypertech is 42501, or something like that. I'm having difficulty finding out if 42003 is completely compatible with my 2010, since most info seems to go only to 2009. Thanks.
I just picked up a 42003 for my 2010 screw 5.4 and It seems to have worked fine. I did have to update it online though.
Other than that It seems like pretty much the same thing. I know a lot of people are going to rag on hypertech and say buy something better but I picked it up for $150 on craigslist so I thought I'd give it a shot and it's just fine