DropTopPony said:The 99-04 are slightly longer...like 1/2-3/4 inch or so per side
97six said:they are just about a full inch longer on each side. a guy in the local mustang club swaped out his 98 axle for a mach 1 and his wheels were a inch farther out on each side. he has 10 1/2 wide wheels. heres a pic.