Yep, I was really happy with the gain. Didn't get that magical 300 number, but it is an auto. Alot of ifs & buts, I coulda fitted long Pacies & cats for another $1,800 & maybe gained another 6rwks or If I didnt go the stallie I think it woulda definately made it, but it wouldn't have been as good to drive as it is right now. I'm loving it, its like having a new car all over again.