AutoliteXtreme Sport Iridium Automotive Replacement Spark Plug, XS4163DP (1 Pack)

Got this from amazon, It came in original box and wrapped in plastic, the plastic was stretched and was a little dirty from a garage. I put some on my truck two months ago and they're without a doubt the best product I've installed. My f150 got these and I honestly wouldn't buy anything else. Please keep in mind I'm aware there's better products available at much higher prices but I'm not a race driver on a closed course, neither is half the folks who run them but that's their money, but for my money I refuse to buy cheap off name brand junk, and draw the line at really high priced stuff that earned their reputation from spending money advertising rather than research, I usually go with mid priced stuff such as these and I found a real gem with these, I'd definitely recommend this to someone!

This plugs are not a fit for the 2005 BMW K1200S like they claimThe Hex 11/16 need it to thread the plug does no fit in the well where the plug goes in the cylinder head.The original size should be 5/8 or less to fit

Can only give 4 stars. Does match my ATV but I've had no chance to use it. Need a back up.

I replaced the stock plug in my Rhino 660 with this Autolite and it starts better in cold weather. It also runs smoother. I was somewhat concerned about the Autolite's thin anode (compared to a stock plug) but there have been no problems with the plug so far.I'll revisit this review in 6-months since I've only used the product for a few weeks.

Work great, could tell a big difference immediately in how my bike ran. Fires up instantly and has more power than before. The old plugs were due to be changed.

It's a spark plug

it fit and works

Perfect swap for my 2001 Kawasaki prairie. Now runs much smoother.