2011 Ford Mustang Gt Bbk Headers Install Bbk High Flow Cats
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Because the long-tube headers displace the stock catalytic converters, BBK's long-tube X-pipe (PN 1655, $249.99) mounts a pair of high-flow cats as close as possible to the header ball joint. Furthermore, the long-tube X-pipe employs 3-inch-diameter tubing instead of the short-tube version's 23/4-inch pipe. View Related Article
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