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I also bought some Magnaflow tailpipes that are 12" long and 3" in diameter (2.5" in) with a rolled edge, and a 15 degree angle for exiting the rear GT valance cleanly. Should look great with the underside of the car being detailed pretty well.
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Here's the "before" pic of the hardware package with the Magnaflow kit.
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I dropped off the clamps and brackets to be zinc plated at Surtronics, and here's what I received...
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A set of JBA 1650 mid-length headers were already on the car and from the massaging required to get them to fit I'm probably not going to deal with replacing them any time soon.