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Re: Jdm cam vs usdm cams.
Japans petrol is highly refined, much better than any UK fuel, I was in Tokyo about 4 years ago, and remember seeing 103-105 on the pumps. I also owned a Subaru Impreza WRX STI V5 several years ago, it was a JDM (grey import) It would pink on UK 98 petrol, it was essential to add octane booster, or risk engine failure. Many owners of Jap import cars learned the hard way, octane booster and remap is the way to go.
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