Thanks for taking a look at my ad. This is a service kit to fit the. Hi-Flo air filter (HFA3908). Hi-Flo oil filter (HF138). Four standard copper core NGK CR9E spark plugs (stock code 6263). 4 litres of semi-synthetic 10w40 Castrol Power-1 engine oil. Castrol Power 1 conforms to the following specification: SAE10w40; JASO MA-2; API SN. Any questions, please feel free to contact me.