Borla 22-24 Nissan Z 2.5in ATAK Cat Back Exhaust 4.5in Tip - Carbon Fiber Black AnodizedBorla 22 24 Nissan Z 2. 5in ATAK Cat Back Exhaust 4. 5in Tip Carbon Fiber Black Anodized This system is a True Dual design that features a Resonator with an Internal H Pipe, Polyphonic Harmonizer technolgy, and SwitchFire techology. All of these features combine to create the ATAK sound level, our most aggressive sound. It provides a more exciting driving experience without any drone. The Merge X Pipe blends the combustion pulses from both sides of