5346 Spark Plug

I use the IKH24 on my 2006 Mitsubishi Lancer Evolution IX MR. For the price i don't think anything would beat them. They are one step colder than the factory once from Mitsubishi, and they cost way cheaper than the stock once. I used to pay less for these, but it seems Amazon increased the price. Never had issues with them, and they would last a long period of time. I have them changed every month or two, since i run my car on race fuel ( VP Q16 ), and the car makes nearly 700 to the tires. I used to run IKH22 when my car was making ~400 HP and those lasted forever, and never had to change them for months. It says on the box not to even think of gapping them as all iridium manufacturers say, but i do gap them to 0.018" and that works perfectly for my power level.

Just put them in yesterday. These things made the car feel a lot smoother in idle and power. These are a great product replacement upgrade. Recommended torque specs is on the box, which is great. -2015 Volkswagen GTI

I purchased a set of 4 of these spark plugs for my 2015 VW GTI. I gapped them according to APR's suggestion of .024” +/- .002”. It runs great and haven't had any problems. Side note on changing the plugs, be patient and have some WD40 handy. The ignition coil doesn't like to come off easy.

Does not fit 2013 Audi A8 4.0 ad claimed... unfortunately I didn't find out until too late to return. Tip of plug must be the cupped indented ones.. yeah yeah I know.

Installed on a 2006 Evo IX running 28 psi with no issues. Just make sure you gap them properly without scratching the iridium tips. Use a feeler gauge, the kind that includes little slips of metal, not the disk or wire gappers. You will still get spark blow out with high boost if you don't gap them properly.

The images in the reviews claiming that the lack of a threaded top connector is indicative of a counterfeit part are incorrect. I cannot guarantee that they did not receive counterfeit plugs, but according to Denso, the design was recently changed and the images showing a solid top connector with no threads are consistent with the new design. FWIW, I ordered a single plug from Amazon and a set from another vendor (Shop DAP if you are familiar with the VW community) and they were identical. I will report back if there are any issues with the newly designed plug.

I just installed these on my '16 mk7 gti running full bolt one apr stage 2. They were gapped at .031 so i brought it down to .026. Smooth running so far, only 250miles on them but will check at 1k.

Had a foul plug, order these bad boys and it runs awesome now!