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Old 02-10-2013, 05:07 PM   #1 (permalink)
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Recommended spark plug

What plugs do the Si come with from factory? Im assuming a NGK but what exact plug? Id like to order some soon. To be more clear, its a 2009 Civic Si k20. Im sure all K's run the same plug.

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Old 02-10-2013, 05:10 PM   #2 (permalink)
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Re: Recommended spark plug

NGK OE Laser.

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Old 02-10-2013, 05:39 PM   #3 (permalink)
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Spark plug info is in your owner's manual.
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Old 02-10-2013, 06:25 PM   #4 (permalink)
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Yeah, its either those NGK or Denso SK22PR-M11S
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Old 02-10-2013, 07:14 PM   #5 (permalink)
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Re: Recommended spark plug

Probably posted a million times, but the search function doesn't work for me.

What're the added benefits on using a "better" spark plug?
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Old 02-10-2013, 08:14 PM   #6 (permalink)
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Recommended spark plug

Stick with oem spark plugs.


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Old 02-10-2013, 08:18 PM   #7 (permalink)
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NGK Iridiums in mine are super awesomely coolz.
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Old 02-10-2013, 09:00 PM   #8 (permalink)
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Hondas are VERY iffy on electrical. They are also very hard on electrical because of vtec. From working with them for so long, ive learned the oem plugs and distributors work the best. Anything else will just cause you issues. However changing your oem plug heat numbers will help if modded. If its stock still, run the recommended plug that Dar-Dar posted.

And thanks for the info Dar-Dar. I was going to check the manual but i honestly figured it wouldnt give you a specific plug number to order.
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Old 02-10-2013, 09:16 PM   #9 (permalink)
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Np. The manual shows 2 recommended plugs, but I think the NGKs are much better.
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Old 02-11-2013, 12:24 PM   #10 (permalink)
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From my understanding, The 8th gen Si's came with Denso Irdium long life plugs from the factory!

Lite 2.0
CC r1998
Engine K20Z3
Gap 0.044

I believe denso part # SK22PR-M11S(stock # 3419)

Same plug but not the long life variant: IK22G(stock # 5348)

Last edited by killswitch21; 02-11-2013 at 12:27 PM.
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Old 11-11-2015, 12:59 PM   #11 (permalink)
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I was going to get the NGK but Amazon has the Denso for half the price less than $5 each!

Amazon Amazon

any reason not to go with the Denso?

-avi

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Old 11-13-2015, 01:26 AM   #12 (permalink)
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You can also use NGK BKR7EIX-11, which has relatively shorter lifespan than the IFR7G-11KS, but significantly cheaper.
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Old 11-23-2015, 12:43 AM   #13 (permalink)
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The stock plugs are around $10 each, you only need 4 of them, and they have a 100,000 mile service life. I'm not seeing a reason to use cheaper plugs, since you'll probably only replace them once while you own the car, unless you drive a ridiculous amount of miles annually.
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Old 11-27-2015, 12:27 PM   #14 (permalink)
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Ngk laser iridium
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Old 04-25-2019, 05:57 PM   #15 (permalink)
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just swapped mine out - 2008 si sedan w/ 127k - had original denso plugs - replaced with NGK Iridiums from advanceauto - used 25% off coupon so total cost with tax was around $43 - driven about 40 miles with new plugs - happy as can be so far - vtec is pulling strong/like new
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Old 06-12-2019, 11:31 AM   #16 (permalink)
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NGK. End of thread.
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