Decided to do some preventative maintenance on my new to me Acura TL 2012 3.5L and changed the sparkplugs for the first time in my life. After reading spark plug threads, I used the basic NGK IX Iridium 93175 that I found on Autozone. After pulling out my old spark plugs, the NGK Laser Iridium 92924 I found them to be longer and have double tips compared to the ones I purchased.

I swapped them in for the 93175's anyways. No issues with idling and I had a successful install. I think there's a difference in how it runs right now (can accelerate from a stop quicker but it doesn't feel as fast. I'm definitely tripping lol.) but I'm pretty sure it's the placebo effect taking over. But will the differing lengths of the spark plugs cause an issue? I know spark plug changes should bring a difference in performance and MPG but hopefully I didn't just hamper both by selecting the cheaper plugs.

I also noticed NGK's laser iridiums on Autozone don't have a double tip either. Could I contribute it to a difference in technology, considering these old plugs might be from 2012?

Here's a pic of the old plugs when I took them out.


EDIT: Also, I'm so thankful to have this forum. Literally, the spark plug replacement guide here saved my ass for those damn plugs in the rear! I would have spent years changing them had I not consulted the guide to remove the strut support.

 

so plugs are pretty much the same minus the ground strap, on your link for factory plugs it will show a fine wire ground strap in taper shape vs standard on the other one.

 

Thanks, I see what you mean. So the ground straps are different but I see that the lengths are different too. On the ones that came with the car, there's this extra unthreaded section that I think makes it longer than the ones I purchased online. I circled it in red to show it. So far, I haven't noticed misfires in the past few days of driving but did noticed a slight decrease in power, I guess you could say. It's as if I press on the pedal and it doesn't deliver that instantaneous power I'm used to. Again, I could just be going crazy but I'm also curious if the length of the spark plugs changed the way the car accelerates. Maybe I'll reset the ECU to see if that changes anything, which I saw is possible on another thread here.