Speed Technologies over the years have become the leader in providing the daily 700HP plus driven Porsche 997TT with the proper exhaust and accessories. With 20 years of experiences, the result is a line of superior performing exhausts for a variety of Porsche automobiles. _x000B_ _x000B_SpeedTech has just released their new system of exhaust design with X-Cellerator Cross-Flow Exhaust System. The Cross Flow designed to offer the discerning Porsche enthusiast the ultimate exhaust system with a number of performance and sound options in one complete package. The Cross-Flow designed by combining the exhaust pulses from both sides of the Porsche boxer motor with an "X" of "Cross-Flow" at the pounds of weight (full system w/cats) compared to the Porsche OEM exhaust. It also incorporates their free flowing, straight through design, along with proprietary Hi-Flow 100 Cell "Race" catalytic converters will improve the sound and performance. The 100 Cell Catalytic Converters offers a quicker turbo spool possible, along with increased torque and horsepower. _x000B_ _x000B_The design is constructed of high quality T304 stainless steel and the muffler is packed with stainless steel wool for years of trouble free performance, even under extreme use conditions. _x000B_ _x000B_Options to Choose From: (Below) _x000B_ _x000B_Sound Preference: _x000B_ _x000B_2.5 Quiet (conversation, phone calls, radio are all very comfortable, yet the exhaust still provides a great GT3 type sound on the exterior). A perfect daily driver system. _x000B_2.5 Sport (a little louder than the quiet version, but still very manageable). Also a good daily driver with a fantastic wail at WOT. _x000B_3.0 Moderate (cell phone calls begin to be a little strained). Aggressive tone due to 3" muffler internals. _x000B_3.0 Loud (A full 3" system that screams at WOT. Phone calls are even more difficult, but still possible. This exhaust is definitely being heard in the cabin and all around outside) Sounds awesome/very aggressive both inside and out. _x000B_ _x000B_Tip Options _x000B_ _x000B_Standard option - re-use OEM tips _x000B_Twin tip option - mirror polished twin tips _x000B_Full 3" dual tips - mirror polished dual 3" tips for maximum performance _x000B_ _x000B_Mirror Polish muffler _x000B_Ceramic Coat Muffler, pipes and/or tips _x000B_ _x000B__x000B_ _x000B_ _x000B_Specifications: _x000B_ _x000B_100 cell "quick spool" race catalytic converters w/V-flange (+$300) _x000B_2.5"/63.5mm piping (quiet) - 3"/76mm piping (loud) available _x000B_100% T304 Stainless Steel Construction _x000B_Optional cat bypass pipes _x000B_Optional muffler bypass pipes _x000B_Modular V-Flange system for quick and easy changes _x000B_Stainless steel wool packing will never break down _x000B_complete kit - includes all required parts for installation _x000B_Proprietary "cross-flow" design _x000B_Fully TIG welded _x000B_Made in USA _x000B_ _x000B__x000B_