HKS EQUAL LENGTH HEADER - 2013+ FR-S / BRZ
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HKS has released this 4-2-1 equal length header for the Scion FRS / Subaru BRZ.
This WILL fit the stock over pipe and any other aftermarket overpipe and frontpipe.
HEADER STARTS AT 1:48 in the video.
The Stock exhaust manifold was designed by the 4-2-1 type layout for a better performance for a lower engine speed torque. Because the first catalyzer is mounted at the exhaust manifold, exhaust pulsation motion that make the exhaust gas to pull back to the pipe at middle RPM range which cause a loss of output by behaving as an exhaust gas re-circulation.
The HKS exhaust manifold follows the same 4-2-1 type layout but making it without the catalyzer provides both more torque at middle RPM range and more peak power for high RPM. Its very easy to drive and follow the acceleration well at middle RPM. And at a high RPM, it has much more power than the stock and feels clean of the NA's high RPM driving characteristic.
With the optional Hi-Power SPEC-L Muffler and Front Pipe(no catalyzer) will have more power and fine NA sound.
If you want to change the Exhaust Manifold(no catalyzer), the Check Engine Light will be on because of the first catalyzer will be eliminated, but you can avoid this by setting the included part. But if used with the Front Pipe(no catalyzer), Check Engine Light will be on. We have checked the drive performance for fail-safe of engine check and found no problem. So depending on the situation, muffler & exhaust manifold or muffler & front pipe will be the options.
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