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ISO or JIS spark plugs?

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edit: never fucking mind, I mixed myself up after looking at too much bullshit online. 2JZ and all other modern Toyota engines use ISO height plugs, JIS is for 7M and older garbage. BKR7E should work perfect with newer COP's.

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They're interchangeable. The terminal nut is 2.5mm shorter on ISO plugs than JIS. Most coilpacks will reach the extra 2.5mm regardless....except for Nissan RB's. They like to misfire with ISO plugs because the spring in the coil doesn't make good enough contact.

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