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Ford Mustang Bbk Headers

Compare the stock passenger-side manifold with the passenger-side BBK header, and it's clear the BBK piece will free up exhaust flow by a good margin. While not a totally equal-length design, the BBK header is obviously much more "equal length" in nature than the stock manifold. All the tubes on the BBK header are as equal in length as space permits, while the stock manifold isn't configured that way at all.
Ford Mustang BBK Headers - How To Install '05-'07 Headers

 Compare the stock passenger-side manifold with the passenger-side BBK header, and it's clear the BBK piece will free up exhaust flow by a good margin. While not a totally equal-length design, the BBK header is obviously much more "equal length" in nature than the stock manifold. All the tubes on the BBK header are as equal in length as space permits, while the stock manifold isn't configured that way at all.  View Related Article

 

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