Improved power, torque and response
across the entire range from low to high RPM.

For naturally aspirated cars that do not have turbochargers or superchargers, intake efficiency has a large impact on power, torque, and response. This time, Kakimoto turned its attention to the intake system. However, the intake of naturally aspirated cars is very strict, and it is very difficult to increase power and torque across the entire range from low to high revolutions.
First of all, since street driving involves a lot of driving at low to mid-range speeds and turning the accelerator on and off, development began with the aim of improving comfort and eliminating the sluggishness that occurs at low to mid-range speeds and during sudden acceleration. The sluggishness at low to mid-range speeds is caused by the engine's insufficient power to suck in air. The sluggishness during sudden acceleration occurs when the engine suddenly demands more air during sudden acceleration, but in vehicles where the throttle is far from the air cleaner, this occurs due to the time lag and resistance between the air sucked in from the air cleaner and the engine reaching the engine. One way to improve the latter is to shift the position of the air cleaner so that it sucks in air from just before the throttle, but this method cannot be adopted due to space issues and possible torque reduction. In order to eliminate the lack of air during sudden acceleration in the limited space between the genuine air cleaner and the throttle, it is sufficient to create an air reservoir just before the throttle. This makes it possible to quickly supply the engine with the air it needs during sudden acceleration, helping to alleviate the lack of air intake power at low and medium speeds, thereby increasing torque at low speeds and improving response during sudden acceleration.
That is the intake chamber. It may seem very simple, but simply providing a chamber can actually result in intake resistance, and can even reduce response, power, and torque. In fact, numerous prototypes and tests were made during development, and performance can change significantly even for the same vehicle depending on the volume and shape of the chamber, with some showing no change at all in torque at low and mid-range speeds and power, torque, and response during sudden acceleration, while others not only improve but actually reduce overall. It was extremely difficult, but as a result of numerous prototypes and tests, we succeeded in improving torque at low and mid-range speeds and response during sudden acceleration.
However, we are never satisfied with this alone. That is Kakimoto Kai. Eliminating the sluggishness that occurs at low and mid-range speeds and during sudden acceleration is only the first step. While we have come this far, we want to achieve increased torque, response, and power across the entire range. This is our final goal. In the first step, we aimed to increase torque at low and mid-range speeds and response during sudden acceleration, but this time we turned our attention to increasing torque, response, and power at high speeds. If we only focus on high speeds, smoother intake efficiency is important. After numerous prototypes and tests, we came to the conclusion that in order to achieve increased torque, response, and power across the entire range, we needed to adopt a chamber volume, structure, and pipe layout that would reduce resistance, thoroughly increase intake efficiency, and compensate for the lack of air at low and mid-range speeds and during sudden acceleration.。
The first step was further refined, and prototypes and tests were repeated, with the chamber volume, structure and pipe layout adapted to each individual vehicle model, successfully achieving overall lubrication, response and power-up, and the Kakimoto Kai intake chamber was now completed in a satisfactory form. The attention to detail is not limited to performance, the quality is also outstanding!! Fully TIG welded stainless steel by Kakimoto Kai craftsmen.
The shining intake chamber and the Kakimoto Kai emblem make a great contribution to dressing up the engine bay.
The Kakimoto Kai intake chamber is unique to Kakimoto Kai, and is a cut above the rest. Makes naturally aspirated cars even more fun.

In the case of the Legacy's BLE/BPE, due to the original shape, the layout of the intake pipe from the air cleaner to the throttle is bent 90 degrees, and the chamber is installed in that part.
The Kakimoto Kai intake chamber has an inner pipe with holes in the top and bottom directions installed inside a chamber of moderate volume.
This allows the intake air to flow more smoothly at high RPMs, and when the accelerator is on during acceleration or at low RPMs, the necessary air is taken in from inside the chamber through the holes drilled above and below the inner pipe, improving air shortages and improving power, torque, and response across the entire range.
*The internal structure of the chamber will differ depending on the vehicle model.