What i have in mind is...

Full John Ashley Exhaust System; De-Cat Manifold, front pipe, centre section pipe and custom quad exit pipes.
Piper Camshafts
Veccy C Intake(Airbox allready de-restricted)
Courtnay/K&N/Regal Panel Filter
Custom Remap

Bearing all that in mind; what sort of gains would i expect to see?

Plus what other suggestions to add to the car before a remap?