This is a genuine replacement type KIT for one-piece big rotor rear.
This is a big rotor that has been enlarged by 70mm from the original size of 260mm to 330mm. The solid rotor has a maximum diameter of 330mm. The Solit-type two-piece rotor shape, with a 330mm Bic size, cannot withstand the high temperatures experienced during circuit driving and will cause distortion. This one-piece construction allows for reliable use on hard circuit runs with strength and high temperatures.
This part uses a 330mm wide Bic rotor to significantly improve performance such as braking power, control, and life cycle, and is designed specifically for each vehicle model and can be installed via bolt-on. This is a special part for updating time attacks, especially recommended for circuit-running users. FF cars, which place a strain on the front with their three elements of stopping, turning, and acceleration, are heavily influenced by the behavior of the rear. This big rotor is one of the key elements in preventing under-controlling, including rear undercarriage settings and braking power for the rear brakes. The installation involves attaching a special bracket and moving the caliper to match the big rotor. It can be installed without any processing other than removing the splash guard.
It is introduced on Ameblo's "M&M HONDA's Honda Honki."
https://ameblo.jp/mandm-honda/entry-12243287430.html