Reply to "ZF Horsepower Rating"

You'll be making major modifications to support the power you want.

There's a guy in Australia who went to a sequential transaxle. Major modifications are necessary to fit this style in the car, and it's significantly bigger/heavier. There are sequential transaxles that are capable of handling what you want from places like Mendeola, etc. The sequential kind of transaxles typically have dog-tooth synchronizers that are meant for racing and don't last very long according to Lloyd B. (RBT Trans). Most boxes from Audis or Porsches aren't that much better than the ZF in my personal opinion.