Our main criteria for the Gtc4, to produce a super light, Inconel 625, valvetronic, full exhaust system, that would be subtle and pleasant at cruising speeds, but to open up the sound to full scream on full throttle and valve open.
Replacing the stock catalyst for high flow 100cpsi HJS sports catalysts, we were able to open the sound significantly. Replacing the stock H pipe for our perfect geometry, laminar flow X-Pipe, enriches the tone, as well as raising the pitch, and producing a fuller, more aggressive sound to the exhaust note. The valvetronic rear section allows the car to be near silent on cruising, while unleashing unrestricted Ferrari scream when the valves are open.
Addition of the Kline “INCONEL BUTTON” valve control wireless kit, allows you to control the valves to the open position for optimum sound for the entire rev range.