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
Isami Amemiya and team will be coming to Pasir Gudang Circuit, Johor next week on 18th Oct 2011.
We shall organise a trip to visit the M7 event with KL, Malacca, Kluang and JB members.