Unless the PCS was a real shitty design, you'll almost always lose power when you go from a 2-1 setup to a 2-2. But, the Cobra might not put out the same numbers as the PCS either (my guess is it won't). I don't know...*** numbers, your butt dyno is more important if ya ask me. I said Rhiney's cause I have 'em and love 'em, but the Cobra's pretty cool too cause you don't see 'em much; pretty unique.