Right now i have a built NA B16 w/ b16 tranny in my sol. The car is a daily driver and sees a fair amount of highway miles at 70mph+ so the tranny is a little short and runs pretty high RPM at these speeds. Does anyone have any recommendations such as swapping just the 5th gear since i would like to keep the decent acceleration but need a taller 5th gear for highway driving.. or maybe a full GSR tranny?

 

get a LS,gsr,type R 5th gear am swaping an ls 5th gear on my b16 tranny

 

Why would you tell him to get a type r 5th...if its the exact same gear as in the b16?

LS 5th (hydro) fits right on (as long as you have both main and counter shaft gears)
I have it in my gsr tranny

Swap is very straight forward, since the 5th gear set is right on top of the shafts, when you pull the casing. Remove 1 nut, and 2 bearings total and youre finished.
Hardest part is putting the housing back together and getting it into the car.