my car has a set of 4.30 which i put in it because i blew up my 4.10 on the 5th pass last year. I think my car would be faster with another set of 4.10 in it.also what size slick are you running? i have M/T 275/60/15 E/T street drag raidels( spelling) that are 28 inches tall and 9 inches wide.