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Oe Plugs For 2000 Ls400?


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I keep reading different plugs as being OE for my 2000 LS400.

I have been told NGK Laser Iridium #IFR6T11 and NGK Iridium IX #BKR6EIX-11.

Which is it? Or is it another?

Over the years, with many different vehicles, I have come back full circle and just tend to use OE plugs in 'em.

Thanks, y'all.

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You're correct. The owner's manual for my 2000 LS400 states iridium plugs.

After running a pint of Seafoam in a tank of gas, and a 1/2 pint through the brake booster line, I changed the plugs with NGK Iridium IX's.

Man, what a difference! I noticed a difference after the Seafoam treatment, but along with the new plugs, I can't believe how much smoother and more responsive she is.

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