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
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We from Tong Turbo Engineering would like users to know more about Billet Compressor Wheels that is widely used in the market currently. TTE has developed several customed compressor wheels with our own...