It's totally dependent on a few things. Engine combo, WHICH single and dual plane intake you're comparing and your ability to TUNE. I can probably take two same engines, one with an Stealth and one with an old Street Dominator and tune the one with the Street Dominator to mop the floor with the Stealth. So the correct answer is "it depends". The old saying a single plane is slow on the bottom is bullshit. It's all in your ability to tune.
