****** - Verified Buyer
4.5
Well when you’re at 90k miles and it’s time to change these do the deed and cost little more than OEM.This was the first plugs I had ever changed and it did take me a long time. Mostly it’s the tools you should know as required and the dam repair manual never tells you that. I needed a really long extension on the 3/8”drive also a snub 3/8” drive with a wobble attachment for a couple of the tuff to reach places. I think the socket size was 5/8” for the plug but have forgot, interestingly non of the plug sockets I had fit and so I did it without the rubber grommet in the deep socket.Hard to believe these use less voltage? And/or are hot or cold. However if you’re like me then you are going to learn about AFM. It stands for something that actually means only 4/8 of your cylinders fire when in low weight mode. Apparently you save 5-8% on mpg in turn for 1/2 hp.Wow what a shocker…Allegedly some of the oil change stores can change all 8 in 30 minutes.Nice plugs at a great price. Used these in my 1971 Nova 350 with Vortec heads. The thread reach is .708” so they fit perfect and the engine runs great.Great plugs for the price. My gas mileage had dropped off significantly, lately. I was having an occasional misfire...trouble starting in the morning... All of the signs that a spark plug or eight were failing. So, After reading many reviews and checking my wallet, I decided on Denso Iridium spark plugs. I had been an AC Delco man, well let me tell you, these plugs are awesome. They come packaged, pre-gapped. (I know because I double checked them.) They have a plastic tube protecting the gapped end. And a box for each plug. I've only had them in about a week, so I can't comment on longevity, but the performance has been undeniable. I will definitely get Denso's for my 2nd car, when plugs are needed. I have received no compensation for this review, but I will happily accept 6 plugs for a Chrysler 3.8 liter. (You know...the 2nd car) ;)Worked greatThese are awesome, was surprised because of the price but they’re working great thus far. I’ll update if the crap out prematurelyThis were great replacements for my oem plugs. I put these on before traveling 2500 miles and my Suburban ran great. The price was right and I feel like these will last a long time. I've always been happy with Denso.Replaced the spark plugs in a 1996 Silverado with 289,000+ miles .. The Denso plugs provided a smooth idle and restored acceleration. Very pleased ..Great plugs.
