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The iridium electrode can withstand prolonged usage due to its high heat resistance whilst still being able to utilize a thinner electrode design (4mm). The advantage of having a thinner electrode is an increase in charge density. This allows the spark to be more effective at high boost pressures and high rpm.
Price is for a set of four spark plugs. (These plugs are rated to over 800hp at this heat range)
NOTE:- May be substituted for NGK equivalent if required. NGK actually make these plugs for HKS, so its the same EXACT plug but without HKS written on them.
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Evo 9 SWB is competing in the UK Time Attack series for 2019, Keep
an eye on our social media for updates and the Norris Designs
YouTube channel for in car videos.
Version 3 supercharger kits proving themselves out there all around
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Version 4 dry sump kits in stock and ready to ship. Featuring the
SUPERB Auto Verdi oil pump.
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2019. Going great so far!
Designs are the UK agent for Bullet engine blocks. We stock 4G63
& 4G64 versions. As used in our Evo 9 SWB demo car.