We use Tungsten Inert Gas wedding, often shortened to TIG welding, technology that through the use of tungsten electrodes produces a weld. The weld areas are protected from atmospheric contamination by an inert shielding gas (Argon or Helium). A constant-current welding power supply produces an artc to melt the object and filler metal through a column of highly ionized gas and metal vaports. Although, gases needed for TIG welding process are noticeably more expensive than other welding techniques, yet it can effectively shield the surrounding atmosphere to prevent contamination, while being insoluble and having no reaction with metals. TIG welding also automatically eliminated the oxide films present on the surfaces of the welding joints. Details and finishes on the objects can be protected from the destructive effects of the atmosphere to the melted metal. A careful inspection of your welding can show the skill, experience, dedication and masterful touches performed by our welding masters. This can not only satisfy the car owners who have an appreciation for aesthetic craftsmanship, but also set a new criterion for the strength and performance of the aftermarket exhaust systems.

Many of the OEM manufacturers adopt the Y-pipe shape that have inherent problems with exhaust pulse hesitation resulting in the loss of horsepower. However, Fi EXHAUST uses big data statistical measurement methods to develop the X-Pipe shape, that produces crisp exhaust sound or increases the exhaust efficiency and improves horsepower at high RPMs.

X-Pipe includes a special configuration design, which improves the resonance of high-pitched sound frequency. Compared with the Y-pipe from the OEM, the front end would restrain the exhaust pulses. Thus, the gas will be pushed in the tiny diameter of the pipe, and this will cause the horsepower loss. To avoid this kind of situation, with X-Pipe the gases are available to go through from the double tailpipes quickly.

Moreover, the central position configuration of X-Pipe provides plenty of space to allow the gas to accumulate in the head section, which can lead to no torque loss under low speeds. The best feature of our X-Pipe design is the ability to shorten the moving distance of exhaust gases. These three features shorten the time of the exhaust flow and enhance the quality of the exhaust.

The joints should be perfectly closed to reach 100% effectiveness out of the X-Pipe design. In addition, 3D cutting, computerized pipe bender machines, manual inspection, polishing, and welding procedures must be carried out.

The shape and design of Fi EXHAUST is a combination of science technology and craftsmanship. We are committed to making your vehicle feel and sound special!

Pipe Diameter

Fi EXHAUST

A focal point in our designs, pipe diameters play a critical role in the quality and practicality of every exhaust system. Larger pipe diameters will result in better horsepower output performance at a high RPM range. However, this does not mean that larger diameters produce better performance when at high RPM; when the diameter size is too large, exhaust gases will not be able to fill up the holding space of the exhaust pipe and the exhaust gases will create turbulence and exhaust outflow issues, which will negatively affect the performance.

Therefore, the Fi Team designs and customizes every exhaust pipe with precision and utmost care based on their original fittings, with the aim to greatly increase the horsepower and torque through an optimal diameter ratio. Drivers will discover a breakthrough in sports car sound performance not available with the OEM exhaust system.

Exhaust pipes with smaller diameter sizes are perfect for torque output under low revs. When under mid to low RPM range, exhaust gases can be released quickly, but under high RPM, large volumes of exhaust gases will be blocked inside the exhaust system, and the exhaust temperature will increase subsequently.