Gear cluster is installed into a unique chrome trap door Designed to slip into stock transmission case .886:1 "overdrive" 5th gear Compact shifter technology increases width and strength of every gear Width increase varies from 18% to 53% depending upon the loads each gear set must carry Made in the U.S.A. Modifications to exhaust bracket may be necessary. Oil filler spout spacer may be required on '02-'06 FL models.. SUPER KIT FAT5 01-05 TC