it fits. APR quad exhaust is designed with the oett rear bumper for sema.
it will fit 100%. however if u have the oett rear bumper, go with miltek. They look better + sound better.
for power wise, apr is more flow and feels less restrictive however it does drone due to the fact that it's not "RSC" technology. It has 3 muffler cans which is prone to droning at odd speeds.