This product is a vacuum power brake booster made of steel and designed as a direct replacement for Ford Taurus (1986-2007), Sable (1996-2001), Mercury, and Lincoln models. It comes in black finish and does not include a master cylinder. The brake booster is compatible with L4 2.5L, V6 3.0L, V8 3.4L, and V6 3.8L engines. The product has OE/OEM part numbers YF1Z2005CA, XF1Z2005AA, and 5F1Z2005A, and interchange part numbers 5474300 and 54-74300. It has a manufacturer warranty of one year and is California Prop 65 compliant. It has been professionally remanufactured. Ready to install! Look at all pics before buying. Sold as is. Thank you!