Billet 6061 T6 Aircraft Grade Aluminum 2 Bolt Driver Side Mount Bolts to B Series Engine Under Timing Cover. This mount is for 88-91 Civic/Crx, 90-93 Integra to fit Honda/Acura B Series Engines (B16, B18a/B/C B20b B20z etc) when doing a B Series Engine Swap. Item is machined from 6061 Billet Aluminum with an uncoated raw finish. Some scratches and chips are normal due to manufacturing and CNC machining. Please make sure you understand this before purchasing the item.