The 54459508 by Ingersoll Rand is the front cover of the beltguard that protects the flywheel and pully on the Ingersoll Rand SS3L3 T30 air compressor.
There can be confusion over which item is considered the front and back of the beltguard. 54459508 is the beltguard section furthest away from the pump. Although referred to as the 'front' beltguard, this is further away when looking at the front of the compressor where your pressure switch is located. This does not include the slots that over the motor and pump shafts.
This is an OEM part from Ingersoll Rand. Please contact us for confirmation this will work with your air compressor.