This SwitchFire™ X-Pipe is designed to replace the Merge X-Pipe in BORLA® Cat-Back™ systems 140742, 140743, 140745, and 140746 and the Black Chrome and Carbon Fiber versions of them. Contains 2) 2.25" inlet x 2.75 outlet adapters, 1) SwitchFire™ assembly, and 4 clamps.SwithFire™ X-Pipe is 25.3" Long x 7.8" Wide x 5" High (dimensions do not include adapters). Completely eliminating the turbulent center intersection of a standard X-Pipe, BORLA®'S patented SwitchFire™ design truly blends the combustion pulses from both sides of the engine for improved performance, while further tuning sound via our breakthrough Polyphonic technology. The result is an aggressive custom sound and improved power. This SwitchFire™ X-Pipe is designed for BORLA systems and will not work on the O.E. or competitive systems.Each SwitchFire™ X-Pipe is built from premium, high-quality T-304 austenitic stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit.