This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.
Purchasing this product requires you to sign our Vehicle Compliance Waiver here.
The factory exhaust manifold for the Scion FR-S & Subaru BRZ was designed in the 4-2-1 type layout for a better performance and torque at lower engine speeds. Because the first catalytic converter is mounted at the exhaust manifold, exhaust pulsatory motion makes the exhaust gas flow back to the pipe in the middle RPM range which could cause a loss of power output by behaving as an exhaust gas recirculation.
The HKS exhaust manifold follows the same 4-2-1 type layout, but by creating it without the catalytic converter, the HKS manifold provides both more torque in the middle RPM range and more peak power at high RPM s. Street driveability is increased with the bump in torque, and at high RPM it provides more power and enhances the clean feel of the high RPM driving characteristics.
Since its beginning, HKS has been committed to providing well-integrated, reliable,and environmentally sound performance systems. Mr. Hasegawa's strong leadership, engineering genius, creativity and willingness to listen to customers are the pillars of the company's success. Monitoring consumer reaction and input on issues pertaining to material quality, external appearance, sound quality, and of course, performance, HKS stays in tune with automotive enthusiasts' needs. Moreover, HKS' products are designed to be user friendly for easy installation.
Today the automotive aftermarket industry is filled with start-up companies following in HKS' footsteps. None however, can match the depth of engineering or manufacturing resources available to the talented, highly motivated and dedicated employees of HKS.
For over a quarter century HKS products have been put to the test in drag racing, road racing, rallying, and top speed trials. HKS equipped vehicles have captured numerous racing championships and hold claim to a myriad of competition records using many “off the shelf”, race proven HKS components. As a result, HKS has been synonymous with “performance” in the automotive aftermarket industry for the past 35+ years.