Any estimates on how much HP I might loose by switching the straight through mufflers to a turbo s-shape muffler?

I dont know why I feel the power loss would be less than 5hp, because if you think of it try to compare a car with cats and no cats, a cat is like literally a dead end and yet some gain maybe 10hp by dumping them max.

Ideas?

 

Turbos dont like restriction after the turbine, just keep that in mind! But most cats these days are pretty high flowing.

 

kooks 15in race muffle is what i have on mine and it sound bad *** and i didnt notice and loss in power gust gas milage cause it sounded so damn good