[dannimo]

I have a stock '98 Chevy Silverado with a 350 Vortech. I want to run true duel exhaust on it. It already has two cats stock. It am planning on putting two Flowmaster "Super 40's" (One of Flowmaster's new mufflers,not the regular 40's nor delta flow). Why does Flowmaster recommend a h-pipe on all duel exhaust. Is there noticable power gains with a h-pipe as opposed to just two cats and two mufflers? Isn't that the point of having duels is two separate the exhaust to two pipes?

[DoubleVision]

H pipes, X pipes between true dual systems create a low end torque increase. there has also been cases where they sound bad when seperated, the H or X pipes equal out the flow and the pressure and create a better sound.