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I got my denso iridiums FOC from my agent (oso owns sparepart shop) & it is already 60k km still running strong. Previously my spitfire / borsch super 4 would last only 40k to 50k km.


IMO iridium plugs are longer lasting then normal plugs but r they worth paying RM160+? If u r using premium plugs then it is worthwhile adding RM10 to RM30 bucks for iridiums. But if using conventional plugs then the price difference is not worth it. When my iridiums kong, probably go back to conventional plug since there is not much difference in performance


But these days accessory shop recommend racing plugs (Brisk, HKS) which are RM250 to RM3++. Some boy ricer swear there is noticable increase in torque and hp.


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