(4-Pack) NGK Spark Plugs IFR7G-11KS (Stock # 7746)

Mileage was suffering with old plugs, almost back to OEM. Fit like a glove, zero issues.

Bought for a 2003 RSX type S. These are legit and were identical to the ones I took out of the engine. Car fired right up and no hesitation or issues throughout the rev range. I am giving 4 stars because while the NGK packaging was fine (with the cardboard cylinder over the electrode) the bubble wrap was very thin on the Amazon packaging. Plug had no damage at all however.

My old Ngk spark plugs (2+ years) I think not yet due but just bought a new set to make sure I pass the California smog. Then replaced back the new to old again and keep the new for my next smog or till the old NGK is busted.

These are the OEM replacement for the K20 as stated in the owner's manual. Bought from this listing because it was the best price I could find anywhere. They installed without a hitch and the car idles and runs well.The ones I pulled out of my car were the Denso brand, and they're the alternate recommended OEM part. Been buying NGK for years without issue, so no worries in switching it up — NGK is more readily available too. Car should run like a top once you get these in. Purchase these without worry.

These are the oem spec spark plugs that come with the car. I replace with these every like 40-50k miles. My car only has 130k miles and I’ve changed it twice. Will be using these until my rsx dies.

These are not what comes OEM with my 2008 Civic Si (K20Z3). The OEM were Denso SK22PR-M11s. The manual says Denso SK22PR-M11s or NGK IFR7G-11KS.After installing these spark plugs, the engine started right up with no hesitation. My car already idled pretty nicely with the OEM spark plugs at 115k (didn't look so bad when I took them out but they were pretty dark).. so it's hard to tell if they made a big difference.. but it definitely felt and sounded great idling.Will update once I drive.Update: it's been about 9 months since I put these in at 115k my car is now at 129k and it idles like new! Car had a valve adjustment at 105k.

I drive an 8th gen Honda Civic Si and I put these on at around 126k miles - I can't remember the last time I changed my spark plugs but it had been a while. Let me tell you: changing out my plugs with a fresh set of these was amazing! On a full tank of gas (topped off) I average around 315-330 miles but now after putting these NGK Iridiums in I'm getting, no kidding, an average of 375 miles to a topped off tank! I couldn't believe what an amazing effect fresh and quality spark plugs have on a vehicle! I effectively gained 12.7% in my fuel economy from this. These will EASILY pay for themselves in no time!

Replaced my Denso SK22PR-M11s with these. Should be a direct replacement but right away the car did not start quickly. Ran them for a few days and each start was labored. Put in the old Denso's and it fired right up. A new set of Denso's are now on order. Wish I knew why these NGK's don't start well.

No issues at all used on my 05 rsx S

Perfect for my 2006 Honda Civic SI