Name: HKS 17 Toyota 86 / 13 Subaru BRZ / 13-16 Scion FR-S / Extension Kit w/ Catalytic Converter (hks11999-AT002)
SKU: 784620

HKS 17 Toyota 86 / 13 Subaru BRZ / 13-16 Scion FR-S / Extension Kit w/ Catalytic Converter (hks11999-AT002)

$ 55.68

$ 72.38

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The HKS Extension Kit utilizes an individual main port (turbine exhaust) and bypass port (wastegate actuator) to minimize the exhaust gas interference and give a smoother exhaust flow. This will also minimize backpressure and enhance the boost response throughout the RPM range. Even with the stock turbine, the exhaust gas combines in the exhaust housing. This exhaust gas interference can be prevented by a divider in the exhaust flange. The pipes connect towards the lower part of the extension housing where the exhaust gas pressure is lower. The main pipe's diameter is enlarged at the turbine outlet so the swirl flow caused by exhaust gas interference can be reduced. This will also prevent the secondary exhaust pressure from rising, and stabilize the boost pressure to increase the engine output. The flange is constructed with high structural steel material, and the piping is constructed with a high heat resistant and durable Stainless (SUS304). These components will also enhance the engine compartment appearance.

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