Who's sells these? Can someone send me a website please?

Thanks.

 

Any auto parts store, I believe they are a 4418 part number.

 

Mike is correct, 4418 is the plug number you want. Go to the nearest auto parts store.

 

I bought 4418's this morning. But last time I got 4417's and they worked, was that bad you think?

 

go with iridiums

 

Rockauto are pretty good for generic parts:

http://www.rockauto.com/

I bought mine from them, and the delivery was pretty quick

 

Having run the Plus 4's for 70,000 miles and replacing them with the Iridiums, my experience was a loss of low end power that the Plus 4's offered and at twice the price, nearly, I wouldn't buy another set.

 

Iridiums may work at sea level but I have heard nothing good about them at altitude. In Colorado where a lot of our trails go over 12000 feet we need all the power we can get to help offset the altitude.

 

Put in coppers and change every 20K.

 

I got my Disco when it had 136k miles on it. It has 145k and I replaced the spark plugs two weeks ago, used the Bosch +4. Bought them from O'reilly's and paid $44.00 for the set of 8.
I noticed improvement on performance and response. It was worth it, my truck had Bosch Platinum Plus.
I suggest you try them and you';ll be surprised too.