Somebody just gave me 4 Bosch Platinum +4 spark plugs, have no idea what it is, the number on the box is 4418, the plug itself has 4418 on the bottom metal part and R3 084 on the ceramic.. Ive been trying to find out if this is the same or will work for the stock NGK B8ES? Anybody know? Do you know where there is a chart to compare the Bosch and NGK? Or does anybody know what plug this would be if it were NGK? Help

 

I dont know but I wouldnt use it in my quad. Splitfires and the similar are known to have the electrode fall off and into the engine. Then you would have a ton of money to invest into your motor to clean up the damage. I hear this from many people. Maybe others will back me up here. I would stick with the NGK.

 

Bosch plugs are a top of the line product. Weather they are the right heat range, reach, and electrode type is another story. I have an ND cross ref that I use to cross match plugs at the shop I work. I'll check for you, and post monday night, If that will help you.

 

Throw the Bosch away and buy an NGK! A couple of bucks is a small price to pay for a quality plug. I'd never run anything other than an NGK in my Blaster. (Don't ever get conned into buying a SplitFire!)

 

Dude, I got them for free, I was just wondering, if they were the same type I would try it out to see if it made a diffrence but probally would not use them, I just want to know what NGK# they are!

 

sorry, double post

 

Well, I had no luck. My cross ref doesn't even have any plugs listed for Bosch with "R" prefix.
I went as far as calling 2 of my suppliers, with no luck also. I work on a lot of European stuff, and have never came across that plug. Sorry I couldn't help.

 

Creampuff, the number is 4418. Sorry for the confusion the other numbers have nothing to do with it, I figured that much out

 

No problem, I had checked both # you posted. The 4418 is the stock # of the plug. My cross ref is a bit dated, but My NGK supplier said that Bosch and NGK don't cross very well. I didn't have a lot of time today to look hard, got a bearing job on a polaris gear box in today, and of course the guy is in a major rush. Don't pitch the plugs yet, I haven't given up.
Pete, AKA cream puff warrior

 

The plug that you have crosses over to a NGK BKR6EP-11 AND BKR6EP-8. Can't tell you what they fit though.