MITSUBISHI Lancer Evolution GSR/MR 2008 ; Extension Housing (Twin Port) & Downpipe w/additional O2 sensor port
HKS USA, Inc., the premier manufacturer and supplier of premium automotive performance systems, introduces the key item in exhaust back pressure control, the GT Extension kit for the Mitsubishi Lancer Evolution X.
With the R & D information gained from the HKS Time Attack EVO X, CZ200S, maximizing the performance from the stock turbine was the primary focus of the new GT Extension kit. Replacing the factory extension housing, the two-piece, stainless steel GT Extension kit also includes a front pipe that bolts up to the factory catalytic convertor. HKS has been able to reduce the exhaust interference caused by single-port extension housings by using two separate ports for the turbine impeller and the wastegate actuator. The result is a smoother exhaust flow and a reduction in backpressure enabling consistent and improved turbocharger boost response throughout the RPM range.
Manufactured utilizing a lost-wax process ensures durability and reliability. The HKS GT Extension kit is available now through authorized HKS dealers and is designated for Off Road Use Only.
The stock turbine offers a compromise between low RPM response and mid-range power. In the higher RPM range, power may feel limited due to increases in backpressure. By improving exhaust efficiency with the GT Extension kit, boost pressure will increase earlier and maintain its increase in power and torque throughout the entire RPM range.
Constructed of stainless steel, a Lost-Wax or Investment Casting process was used to manufacture the ideal shape of the extension housing based on CAD design. This process eliminates the need to weld 2 pieces of material together reducing the chances of cracks and failure due to heat. The smooth surface of the lost-wax casting process assists in the flow of the exhaust gas while ensuring durability and reliability.
The GT Extension kit features two separate ports for the turbine impeller and the wastegate actuator. By utilizing two independent ports, HKS has been able to reduce the exhaust interference caused by single-port extension housings. The result is a smoother exhaust flow and a reduction in backpressure enabling improved boost response and consistent turbocharger boost levels throughout the RPM range.
The GT Extension kit replaces the factory extension housing and includes a front pipe that bolts up to the factory catalytic convertor. To reduce vibration caused by one piece front pipes and to improve durability, the HKS GT Extension kit connects to the front pipe utilizing the factory ball joint gasket.
– Includes both the HKS 65mm Downpipe + HKS o2 housing turbo outlet pipe. Also includes necessary hardware, and gaskets needed for an easy installation.