If I get this 9 inch moser housing for my camaro do I have to get an adjustable torque arm or just an aftermarket one?

 

If you need a 9", you will also need an aftermarket torque arm. The factory stamped steel one will flex at those power levels; nonetheless, you could still get by on a factory one for a whiile.

Oh, if you're worried about having to adjust pinion angle, it should be the same as stock with the moser TA bracket.

Ben T.