All the sifus in here.....you all really know what yur talking about so i was hoping you all could just giveme some advice...by the way im new in here ...

I drive a Wira SE auto (1.5)....i have chnaged to K&N filter and also remove my cat conv...so far the results were marginal...i was wondering whether i should remove my mid box as well and replace with a bullet....im actually looking for better performance and also a louder (basier) sound...will removing the mid box help? i was told auto...