The GR700, GR900, and GR1000 transmission kits are variations of the Tremec T56 Magnum, which is the highest torque rated 6-Speed manual factory transmission ever built. The magnum transmission is heavier duty than the older Fbody T56, and while they share the same internally as the TR6060 the case is not the same. The Magnum is engineered to accept an aftermarket bellhousing, while the TR6060 has an integrated bell that is not easily removed since it has an integrated pump and bearing support.
Check out the technical section for a complete install guide.
Got a GS300, S2000, BRZ/FRS or S13?
I can put together a "universal" kit for many different cars and engine combinations. Contact me with your project details!