Spark Plug for 4AGE BT 20v engine is IK20.
For further information, u may refer this website
http://www.globaldenso.com/en/products/aftermarket/plug/basic_knowledge/heatrange/index.html
The Shanghai Grand Prix may have ended on a sour note for the Red Bull Racing team as the wrong pit strategy let them down and allowed McLaren to snatch a win but...