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I just received my Speedbuilt Banshee w/ bumper cutout's and after having read all the threads I could find here, I think I'm ready to go with my first major mod! The system looks very good quality wise and I'm hoping it's a little louder. My question is; should I see any HP gains and if so how much?
 

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I believe it's made by Borla, so it should be louder. Most all cat-backs get similar horse power gains; ~5 to 10hp.
 
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