OP - Optional partEvolution Header Set (Titanium) must be mounted together with Slip-On Line (Titanium) system S-PO/TI/15 or Slip-On Race Line (Titanium) system S-PO/TI/8. An additional original Porsche stock bracket (Porsche p/n: 99111147391) is required for mounting the Akrapovič exhaust system.Please read the instructions carefully before the start of the installation.Evolution Header Set converts the slip-on system into a full system designed to give noticeably increased power at higher revs. Handcrafted titanium headers incorporate 100 cpsi sports catalytic convertors and side mufflers—all designed to increase power and torque—the Evolution Header Set utilizes integrated catalytic convertors and the functionality of the exhaust valves to deliver an out-and-out attack on the senses. With the valves in the open position, it delivers a sportier and hard-hitting sound, but also has the option of a lower sound level when the valves are closed, perfect for use in more everyday locations.Offering an increased weight savings in the area behind the engine and the rear axle, the reduction will enhance the handling and improve performance.When installing Akrapovič aftermarket optional link pipes with sports catalytic converters or without catalytic converters, which are developed for use on closed tracks only, remapping the ECU is mandatory.]]When installing Akrapovič aftermarket exhaust system that was developed for use on closed tracks, we recommend remapping the ECU in order to prevent potential »check engine light« warning signals. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.PERFORMANCE: Unit Stock Akrapovic Max gain Maximum power kW 385.6 / 8350 rpm 394.4 / 8400 rpm + 10.0 / 6550 rpm HP (m) 524.3 / 8350 rpm 536.2 / 8400 rpm + 13.6 / 6550 rpm HP (i) 517.1 / 8350 rpm 528.9 / 8400 rpm + 13.4 / 6550 rpm Maximum torque Nm 483.7 / 6050 rpm 497.5 / 6000 rpm + 28.9 / 2100 rpm lb-ft 356.8 / 6050 rpm 366.9 / 6000 rpm + 21.3 / 2100 rpm
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