yea it is but its worth it if ur goin to push over 400whp. u can find a used one with low milage for about 3,200. and thn everything u will need to do it with is about 2,000. it will be more though since ur goin from automatic. and if u dont want to spend as much then go with the r154 5 speed. it can hold alot but it has really long gearing.