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996 TWIN TURBO/ GT2 / X50 Corvette Parts Worldwide has a wide selection of 996 TWIN TURBO/ GT2 / X50 For you to enjoy. Our 996 TWIN TURBO/ GT2 / X50 come in a wide variety of colors, sizes and materials. Corvette Parts Worldwide is committed to offering excellent merchandise that we get at the best prices for you. For all your 996 TWIN TURBO/ GT2 / X50 needs, go to corvettepartsworldwide.com. Billy Boat Exhaust Porsche 996 TT Exhaust System Billy Boat Performance Exhaust has once again taken the lead in the exhaust aftermarket by designing a revolutionary exhaust systems for the 2001-2003 996TT. The LeMans System features a single transverse style muffler with 200 cell metal high flow HJS cats and provides a deep, yet mellow exhaust note. In addition to increasing torque and horsepower the B&B exhaust system for the Porsche 996TT also offers improved flow and a unique exhaust note. A distinguished appearance is achieved with the optional bold TT tips that contour to the factory valance and enhance the styling of this already sleek performance machine.