4996 Laser Iridium Spark Plugs IFR5T11 Pack of 4

$36.00...What a deal! Paid $76.00 at Auto Zone for the exact same plugs before purchasing these. I returned the other plugs and saved $30. I thought the package and the plugs from this seller were identical. If these aren't authentic I couldn't tell. I've put about three thousand miles on my 09 Prius since installing them and milage has improved and the car runs great. I guess time will tell but so far so good.

I bought these for my '04 Prius after driving her two hundred thousand kilometers on the original plugs. I bought these from Amazon because the price was better than the Toyota dealership. Much to their dislike they put them in. I guess they like their higher markups. As for performance, I was hoping for a noticeable increase as well as better fuel consumption. I got the chance to test them out while waiting for a red light at an intersection. A sporty new Corvette pulled up and after some brief glances we gave each other the nod and away we went. The hybrid system fully charged gave me a nice jump with both engines, electrical and combustion responding nicely. The 'Vette, smoking up her tires in an impressive show, had me on the first hundred yards, but then the Prius hit her mid range sweet spot where the cvt really kicks it up a notch. It was close, but in the end the Japanese techno machine was too much car for this old time American thunder. I glided off in silence with Al Gore and a crowd of impressed bystanders waving at me. Well, that's when I woke up.... Anyways, the plugs are great, much better than my overactive imagination...

Seems to fire up and work great, easy enough install. 2005 toyota corolla le.

These spark plugs replaced identical plugs installed 100,000 miles ago. I was very satisfied with the performance of the NGK plugs over the past 8 years or so. I expect these plugs will perform just as well for the next 100,000 miles. If the vehicle is still chooching along, I'll grab another 4 pack of these!

These plugs are definitely one of the best on the market.

These are an economical replacement for the Toyota supplied plug, an $89 job at my local dealer. For about one half that money, you buy these plugs and do the simple job of changing them yourself. New plugs really perked up the car and improved the mileage I put them in my 2006 Matrix, and with the head being aluminum and the plug threads steel, I put a very small amount of anti-seize on the threads when I installed them. The next time I don't need to worry about getting the plugs out. Just avoid getting any anti-seize on the electrodes.

Pulled out factory old one's and these were the same plugs they use on my 2012 scion xb, no problems as of today. Highly recommend

I used these in a 2003 Honda vtx 1800c, its one step hotter than stock and they work great! I would Recommend.