Cat Backs

[spyder210]

Hi, I am confused about tone via different catbacks...

1-flowmaster american thunder $260
2-magnaflow $370
3-magnaflow magnapacks $400

I hear that the magnapacks are the loudest overall and have the deepest sound? Some say Flowmaster does though....what is the truth? And according to their different prices which is more hp for the money....i hear magnaflow is better......Any dealer or website reccomended to purchase these catbacks?

Thanks....

and once again people talk about how they removed their air silencer on their stangs....does that make air flow increase? is it louder? wat is the silencer? is it the housing for the filter?

thanks