NGK Iridium SR20DET Spark Plugs
Product Description
NGK Iridium SR20DET Spark Plugs for S13, S14 and S15 engines. These are the OEM plug for these engines. Heat range 6 is for stock engines at stock boost levels only. Heat range 7 is for SR20DET engines that are under 330whp. Heat range 9 are only recommended for SR20DET's running race gas or engines producing more than 350whp. Price is for a set of 4.