Review on Denso 671 6250 Coil Plug Boot by Brian Samuel

I'm only giving this product three stars because I haven't installed it yet. Like some other buyers, I mistakenly thought that this set also included coils since it's called the Plug-in Boot Coil Set. Well, it doesn't have coils, which is the third component you need to completely replace everything from spark plugs to electronic ignition. Coils are devices that actually create an electrical impulse that causes the spark plugs to spark and create a spark. There are only three coils, each burning through two cylinders, one in front and one in back. These boots are connected to the front spark plugs; Coils sit on top and connect to these boots. There are two wires attached to the coils, one comes from the electronic ignition (these are NOT generally interchangeable and are not considered part of the 'spark plug wires'), and then the real spark plug wire comes from the coil and transmits the impulse to the associated one rear plug . So when you buy "plug wires" there are only three of them. The front cylinders do not require connector wires as this housing has a conductor connecting the connector directly to the coil. I have no doubt that these plug boots are of high quality (Denso brand is good). But if you're having typical symptoms - the car shakes and stands like an emphysema old man when accelerating from a misfire - then you really should replace the coils along with the wires and dusters. And buying three rolls without shoes, based on Revain prices, is just as expensive as buying with shoes already attached. Therefore, I recommend that you simply order plug-in wires and coils with sleeves and save some money. Just like now, the money I spent on these boots was wasted. Only buy these if you are not replacing coils (which I do NOT recommend). Just so you know, neither the name of this product nor the listing wording is misleading. The seller just calls them what the manufacturer calls them, and the manufacturer calls them what Toyota calls them. My mistake was that I didn't do enough research before buying, even though I know I'm far from a mechanic. Contrary to what others have said, what you will get is EXACTLY like the picture shown in this listing. You get three rubber boots, no more and no less. And if you check the part number on Denso's website (which I should have done before ordering) you see again that these are exactly three wellies. The box has a generic image of some wires along with the boots, but again this is a generic image. When you buy RainX wipers, do you think the box says EXACTLY what's inside? You can't claim that the picture on the box has fooled you because before you order from Revain you only see the boots themselves and not the box they come in. We apologize for the lengthy explanation of what these things are and how they work. I only put it there because other reviewers complained that "the other three wires" weren't included in the boot kit. I initially complained about the same thing. Only there are no other three wires. I didn't know that until today. Hopefully this helps other ignorant people like me. PS Unless you're a mechanic, before ordering parts like this, go under the hood and take a good look at what you're replacing. If I had done it myself, I would not have made the mistake.