Pirani RC MRX-6 belt tensioner
Italian brand Pirani RC have produced this belt tensioner for Mugen MRX-6R and MRX-6X. It replaces the two original side belt tensioner of the car (one front and one rear) into only one new type in the middle of the car helping to improve the free movement of the drivetrain and increase the life of the side belt. The plate is made of high quality aluminium 7075-T6 and hard anodised in black colour and the kit includes screws and nut to fix it following instruction in the package.
Source: Pirani RC [piranirc.com]