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Exhaust systems represent another performance restrictive element of many stock vehicles. HKS offers bolt-on replacements for OEM exhaust components that reduce backpressure and thermal stress, allowing engines to breathe more easily and create more power and torque. Each HKS exhaust system is vehicle specific, designed for only a particular engine/vehicle configuration. Using extensive computer controlled flow analysis, dyno testing, and precision fitment design, HKS exhaust systems produce maximum horsepower without dramtically depleting low-end torque. Each HKS exhaust system is flanged and comes with all gaskets and hardware, to provide the easiest direct bolt-on installation possible. Additionally, all HKS exhaust systems utilize factory mounting points and hanger locations and are 50-state emissions and sound legal. |
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| As pipe diameter and design are critical to the characteristics of exhaust flow, HKS exhaust systems feature high-quality mandrel bent piping. Mandrel bent piping is superior to press-bent piping as there is no reduction of inner diameter in bend areas, resulting in less restriction. HKS Drager and Hiper exhaust systems utilize stainless mufflers with aluminized steel piping with a backed on coating while Sport and Turbo exhaust systems are constructed with aluminized steel piping and muffler assemblies. Each system ensures exceptional durability in all climates and weather conditions. |  |
The HKS Hiper Damper suspension focuses on providing custom tailored handling while maintaining a comfortable ride. The Hiper Damper offers both ride height and shock dampening adjustments. Ride height is easily adjusted by a threaded 60mm spring retainer and lock nut that rotates around the shocks cylinder body. Shock dampening is adjustable from firm to hard at 10 different increments. This adjustment affects both shock compression and rebound stiffness. Some applications offer camber adjustments.
The PFC F-CON is a plug-in fuel computer designed to supplement and refine the OE specified fuel curve. The F-CON performs its function by modifying the factory specific injector pulse width based on information obtained from the OE ECU and the absolute pressure transducer included with the F-CON. This information is compiled by the F-CON and the resulting signal can allow for a longer pulse width for factory injectors or it can take advantage of larger injectors to ensure proper air/fuel ratios during high air flow conditions. HKS includes with each appropriate F-CON kit a device known as a Fuel Cut Defencer (FCD). Several types of FCDs are made to raise the fuel cutoff point. This additional component allows the PFC to be effective at boost levels that would normally shut down the factory fuel system. The FCD, except in the case of Toyota's newer engines, should not be used without an F-CON or some type of supplemental fuel system because the FCD will adversely alter fuel delivery without the addition of supplemental systems. The F-CON is installed by simply plugging in the supplied factory quality wiring harness, mounting and plugging the pressure sensor, and plugging the FCD where applicable. The installation of the F-CON provides the owner the opportunity to return the vehicle to stock conditions by simply removing the unit and harness. While the F-CON is preprogrammed with a ROM for each application, there is a built-in adjustability switch accessible from within the F-CON to compensate for alterations to the HKS staged upgrades. Additional tuning for the F-CON can be performed by using the the Graphic Control Computer (GCC). The GCC is an additional electronic tuning component designed to add flexibility to the VPC or PFC F-CON. Five points of adjustments allow up to 16% rich or down to 12% lean. Four different RPM ranges allow for maximum flexibility.
While most of today's vehicles come equipped with factory gauges, rarely do they measure accurately. Most display a numerical value based on calculations of readings from the air flow meter or mass air sensor. While this is adequate for most stock vehicles, the true performance enthusiast demands more from their gauges. As with all HKS products, the HKS meters are built in Japan, and are designed to offer the most accurate information possible. HKS meters are available in multiple configurations, each designed for a specific role in monitoring the vehicles vital systems.
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Air/Fuel Ratio Correction Function
The Super Sequential Blow-Off Valve (SSQV) is a pull type relief valve. This means that pressure forces the valve shut unlike most valves which are pushed open slightly under boost. The SSQV is actuated by pressure alterations only, ensuring quick valve response and complete closure during idle. Typical blow-off valves utilize large valves in order to accommodate high boost/high hp applications. However, these large valves react slowly and require high activation pressure to open. Smaller, fast reacting valves, do not permit the air flow required for high horsepower. The SSQV incorporates both for maximum performance. It is engineered utiliizing a small primary valve and a secondary valve for additional relief capacity. The SSQV is made of billet aluminum and emits a unique aggressive sound.
The Twin Power Ignition Amplifier is engineered to produce a hotter and more efficient spark needed for high performance applications. The Twin Power continuously monitors the coil to allow the ignition system to reach maximum capacity without overcharging. The Twin Power also provides optimum spark duration and voltage output. The Twin Power combines a Capacitor Discharge Ignition (CDI) and a Transistor Ignition into one package. While the CDI is effective at producing high voltage, it can only do so for a short period of time. The Transistor Ignition controls current to the coil via an impedance matching circuit, to produce a longer spark duration. This powerful combination creates greater horsepower at higher RPM levels and increased throttle response at lower RPM levels.
The HKS VPC is designed to physically and electronically replace the OE air mass sensor which presents a significant restriction to the intake system at higher boost levels. The stock sensor offers no adjustment or reprogramming options to take advantage of dramatically higher air flow or larger fuel injectors. The VPC converts the air mass system to what is referred to as a "speed density" system by utilizing a 16 bit central processing unit reading its own intake air temperature sensor and absolute pressure transducer. This unique feature not only allows the VPC to replace the factory air mass sensor assembly, but also raises the fuel-cut limit. The VPC also allows driver adjustability of throttle response, idle mixture, and the entire fuel curve. Another benefit is the ability to create custom chips to take advantage of higher capacity injectors, fuel pumps, or turbos. Additional tuning for the VPC can be performed by using the the Graphic Control Computer (GCC). The GCC is an additional electronic tuning component designed to add flexibility to the VPC or PFC F-CON. Five points of adjustments allow up to 16% rich or down to 12% lean. Four different RPM ranges allow for maximum flexibility.