NGK Spark Plug - IMR9D-9H (4 Per Box) ronstan track - series 19 - luff groove profile With Acetal polymer sheaves this

With Acetal polymer sheaves this fiddle block with a multi-position cam cleat and universal swivel head is available in the Series 40 size only

ensuring a secure fit for your marine equipment

- Get accurate readings with GPS technology

these are  3/8 unc into head reduced to 5/16  manifold studs while port alignment with cylinder heads is the same the clearance for a larger stud and nut makes them difficult to fit

it is both strong and effective while remaining safe for use

NGK Spark Plug - IMR9D-9H (4 Per Box) ronstan track - series 19 - luff groove profile With Acetal polymer sheaves thisNGK Spark Plug IMR9D 9H (4 Per Box). NGK have over 80 years of experience in spark plug manufacturing and they are the world leaders in spark plug technology. They have an extensive range of spark plugs, each with their own unique characteristics specifically engineered to its vehicle application and they are designed to suit a broad range of vehicles on Australian roads. With their dedication to quality, outstanding reliability and state of the art