Steering Shaft Knuckle U-Joint (NC Miata / RX8) NEW OEM MAZDA Lower steering shaft u-joint. (Yes, a used one is pictured.) Steering Shaft Knuckle Fits:2006-2015 MX-5 Miata2004-2011 RX-8 MSRP: $180.18 Was: Now: $139.45 Add to Cart