it doesnt matter either your car is an auto or not. the transmission is just a device that transfer the engine power to the wheels . thats all .. the engine is still the same no matter manual or auto .
well ..like i said, u cant put a bov (blow off valve) to a N/A engine. Period. Even you put it, its just wont work. even the bov diafram only works on +ve pressure not vacuum.
The only way for your car to have those BOV is an engine swap to GSR or Evo 4G63 engine or bolt-on-turbo to ur current engine ..
bolt on turbo means, installing a turbo system to ur current engine. since you are just want the sound not the performance, 3-5 psi would be enough. cost for a bolt on would cost around RM5k-8k including a good piggyback ecu.