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It was NOT an controlled test. Also, that was done on a very high hp Z. On a stock turbo Z, you won't notice much difference. And since most are running on stock turbos, there's no reason to put an ugly exhaust on your car. On a Z with 500+ rwhp, one would benefit from a 3" exhaust. B&B makes one of those too. :-) And I'm sure it would dyno more than the Hiper. The whole argument is silly and stupid. The B&B is the best all-around exhaust (performance, looks, sound, material, and quality). If anyone can argue that the Hiper is better in any other category than performance, I'll give them a dollar. It's hideous.

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