If it is 54 mm (2 1/8 inches INSIDE DIAMETER) order this hose. OUTSIDE DIAMETER IS ABOUT 2 3/8 INCHES.
If it is 64 mm (2 1/2 inches INSIDE DIAMETER) order the other version below.
This is the longer of the two hoses that connect to the intercooler. The hose assembly comprised of two rubber hoses clamped to a plastic bracket/housing which holds both the intake air temperature sensor and MAP sensor. Neither the upper, nor the lower hoses are available as separate units. This is only available as a complete assembly.