The Detroit Speed Mini-Tubs are inner wheel housings designed to accommodate wider tire and wheel packages. They are designed for a perfect fit, retain a stock appearance, and are available exclusively through Detroit Speed The Mustang Mini-Tubs come with a replacement framerail section and doubler reinforcement plates to accommodate a wider rear tire. The Mini-Tubs are up to 2 1/2" inches wider than stock, stamped from 18 gauge steel, and made in the USA. Mini-Tubs will significantly reduce the number of hours required for a mini-tub project. Narrow fuel tank is required with this mini-tub kit: PN: 080126DS - Holley Fuel Pump Required