This is an OEM clutch slave cylinder. It is the gray style with an 11/16" bore, commonly found on the AWD cars. The 11/16" bore gives you a little more travel from the clutch than the earlier and the FWD blue ones which are 3/4". If you are having clutch release issues this may help.
Genuine Mitsubishi
Fits 3000GT VR4 and Dodge Stealth R/T Turbo AWD