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
recently decided to remove my JSpeed manifold heat shield due to its rattling on idle. Its spot weld has came off. Suddenly notice a hair line crack measuring approx 3 inch long. During idle it doesnt...