6.11, fist gear lasts .000000003 seconds. JK 3.55's are the perect rear for these. I can't imagine 4.10's in these things, you better be quick with the stick.
Well since the new cobras have a T-56 its a whole new story. We all know that 4.6's love higher gears, but now since there is a blower in the equation you cant get too crazy. Some 4:10's would be a good street gear, but for the more hardcore enthusiast, 4:30's would be perfect. Don't fear the gear.