1/ Yes the back box is the same :) , as in the dimensions are the same so it will fit, although there is an internal difference as the RS200 has a flap that opens when over a certain pressure...
2/ factory wheel Alignment specs- On 32psi tyre pressures-
Rear Axle:
Camber -0deg 55min +/- 45min
toe in +0deg 11min +/- 11min
Front Axle:
Camber -0deg 30min +/- 45min
Castor +6deg 05min +/- 45min
toe in +0deg 05min +/- 05min
contact Tony on his website for a more accurate diagnosis
Could this flap be responsible for the flat spot on acceleration im currently experiencing? The flat spot is between 3-4k revs
How much would I be looking at for a new back box?