Well, lets get one thing cleared up. Its not a stock 3'' Y-Pipe like most out there. Its a 4'' setup. Why did he go that route? Who knows, who cares?
He has never once said he "didnt" try duals. He just did what he did with a y pipe setup.
The moral of the story is Y-Pipes have been proven to be just as efficient as TDs when setup correctly. I know the Y-Pipe he had was custom with a 4 inch merge. At the end of the day it's still a Y-Pipes. TDs aren't stock either, that's why I used Pat Gs exhaust setup.
More to times than not a Y-Pipe offers better clearance. But that's besides the point. We are getting way off subject. I'm sure these Mustang could care less about which us better
Edit: Of course a TD setup will be better than a 3' Y-Pipe setup....your comparison isn't apples to apples
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