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
I would like to know, instead of buying a brand new map sensor & air temp sensor from Haltech. I was told I could replace these items with others and it'll work.
I have invited the Silvia's Owners for this Friday's TT session too. It will be great to have Nissan Sportcar Owners to get together and get to know each other.