This is a genuine OEM Honda crankshaft washer that fits multiple models including Civic Si, S2000, Acura ILX, RDX, RSX, and TSX. It is manufactured in Japan and has OE/OEM part number 13331-PCX-003 with the superseded part number 13331-PNA-004. The brand of this washer is Honda and the manufacturer part number is 13331-PCX-003. The product is made of high-quality material and is designed to provide optimal performance. It is important to note that this product contains chemicals, including lead, which could cause harm. For more information on this, please visit https://www.p65warnings.ca.gov/. This washer is a perfect fit for your engine and will help maintain its performance.