NGK spark plugs
Thread Starter
Member
Joined: Jan 2020
Posts: 147
Likes: 16
From: Fairfax, VA
C8 Z06, Mercedes C43 sedan, Jeep Grand Cherokee
NGK spark plugs
Hi all, I had bought the NGK Iridium spark plugs from FCP Euro a while back intending to do them on my C43. It's a 2021 model. I have recently read that you aren't supposed to use NGK plugs on the m276. Is there any validity to this? Is there a downside to using the NGK as FCP shows them as OEM quality. These are the plugs I got: FCP Euro NGK Plugs
Junior Member
Joined: Jul 2025
Posts: 49
Likes: 9
2020 AMG C 43
I got the same kit and installed it in October of 2025 on my 2020 c43. Ran them on a Stage 1 tune and now on stage 2.
Whatever you're hearing is a rumor. These plugs are probably the best plugs you want in your c43. They are ready out of the box. No need to gap them.
Whatever you're hearing is a rumor. These plugs are probably the best plugs you want in your c43. They are ready out of the box. No need to gap them.
Thread Starter
Member
Joined: Jan 2020
Posts: 147
Likes: 16
From: Fairfax, VA
C8 Z06, Mercedes C43 sedan, Jeep Grand Cherokee
Great, thanks!
