NGK 6510 LTR7IX-11 Iridium IX Spark Plug (4 Pack)

Have used these since I purchased my Focus ST and Ecoboost Mustang. I have ran them since stock and tuned. I change spark plugs every 10 k miles. My Focus is big turbo pushing 25 psi on e30 and does not misfire during wot pulls at all. Mustang is stock turbo e30 and no misfires during pulls as well.

Great product they are originals

Great Price For The 6510s

Mazda 6 2.3 fit nice, reemplazo de sp548x

As described. They came with a .038 gapped. Had to adjust a little bit

Never had one go bad, or foul. I've used this brand in a tuned Focus ST and stock Toyota 86.

They do what they do, just a better price at almost half than the auto parts store

I switched from Denso Iridiums to NGKs. I've had fewer misfires with the NGKs. You do have to set the gap to the vehicle, but with a little effort you can dial in the spark you need.