I just installed an LS fifth gear in transmission. If somebody is installing a ats final drive, installing a gsr 5th gear might be beneficial in lowering rpms on the freeway. $50 shipped for both countershaft and mainshaft gears.

 

i also have a ITR/b16a 5th gear also. Not sure why somebody would want one, but if interested, make me an offer.

 

still got the gsr 5th?