Do you really beleive that the tranny doesnt matter that much ? So you will buy a header for 600 dollars that might make 5 more hp and probably not even change your time in the quarter but paying 100 more for a b16 over a gsr which might give you 3 tenths is not that much ? Really man ? The tranny is everything why you think a h2b runs high 12s over a h to h running mid 13s by just changing the tranny. Getting your tranny right is the cheapest power you will find . I would pay 600 for a 4.9 final for my tranny to dropp me half a second in the quarter verses 600 for a header to hopefully get a tenth off. Saying the tranny doesnt matter that much is the worst comment ive heard in along time. If he doesnt race and dont care about speed then sure but if thats the case why did he post a thread asking ?