Spark plug Bosch or Champion

Bosch Plugs are tops in any application you use them for... All of their parts are worth what you pay for them...I've...\"NEVER\" had a Bosch part of any kind to fail at its applied usage...! True top of the line German Engineering... period...!!!!!!

I used Bosch plugs in mine about 3 months ago and I couldn't be happier.

Spark plug Bosch MB - $26 AUD each (part SPVA6SIP80)

Plugs are by BOSCH. Post this job, it runs a lot better, and I mean a loooot!

if you want to save a bit and still want some quality get bosch plugs those are good too, I’ve used them before and they were pretty good as well.

Took original plugs out at 50K miles. Not awful but electrode partially rounded with increased gaps. Stock plugs are Bosch and apparently copper core, so I replaced with same. Recommended gap is 0.043'' Added anti-sieze to threads for easier removal next time.

They're both fine brands, I doubt you'll notice a difference. NGK is most likely OEM for your Civic, but it's not like Bosch is bad, they're OEM in my BMW.

Bosch spark plugs are also trash.

Those spark plugs are junk, and on top of that, they are now carbon fouled. I would strongly encourage you to install new, normal, spark plugs.

I ended up checking the ignition timing again, put in a new coil, new knock sensors, put in another fresh set of plugs, set the DPR MA to +5, and I failed my emissions test with the same results.