This is a Siecle response ring purchased for a Mitsubishi Triton. It is new and unused. When I test-fitted it, I realized it only fits the genuine air cleaner, so I no longer need it. *I have a suction chamber installed. There is a chip on the box from when I put it away, but it's not on the part that sucks in air, so there should be no problem with the product. Please purchase only if you understand this. Product Description (Official Quote) Significant improvement in torque By precisely controlling the air intake path, a rectification effect and increased flow velocity are created, resulting in the best performance from the moment you step on the accelerator.