The 1250 fits really good and tight, it just hangs over on one side or the other, depending on how you set the gasket, maybe 1/32-1/16 of an inch, but its enought to probably restrict some air flow. Nothing a little razor blade couldn't handle. I still think I am going to use the 1262, just because I just bought them. My 30lb c&l calibration tube will be here sometime next week, and then I will slap the intake on and see how it runs. I will have to hold up on the 1 3/4 lt's for awhile but oh well. What do you guys think I should set my A/F ratio at. Its at 12.75:1 on my extender right now and runs good. I will let you know how it runs.