Hi, I have a stroked sleeved turbo b16a and I'm looking at tranny
upgrades,

Ok I have a LSD, but I am looking for higher top speed and I wasn't sure if anybody made final drive ratio gear lower than stock in a y21 tranny. Right now I can get to about 155mph at 8500rpm but I need more speed at lower rpms. All I can find is kits to raise the ratio. Do you guys know of anything? Maybe a longer 5th gear? Is there a company that makes stuff like this?