From the Rock Auto catalog - 2008 5.4 3V:

MOTORCRAFT Part # SP507 {#PZT14F}
w/Black Coil Boots; .045 Gap

$8.58 $0.00 $8.58
MOTORCRAFT Part # SP509 {#HJFS24FP}
w/Brown Coil Boots; .041 Gap

$10.15 $0.00 $10.15

The brown boot engines have the new heads.

 

Just wanted to give feedback, The champions have been in my truck for 35k miles with no problems...injectors however are another storey.....

 

Bet you had to dig a little to find this thread again..

 

Man I'm subscribed to so many threads I can't even find the ones I'm looking for from last month!

 

Ok so I have been putting off the plug change for a while now, I'm at 49,000 miles. Truck is starting to idle a little ruff, the gas mileage has gone down hill big time, It has a tendency to stuble if you accellerate hard from idle, but it is throwing no codes as of now. I have read so many horror stories on changing these plugs I don't know what to do. I was planning on buying the Lisle tool in advance, anyone have the part number for it?
So which plugs has everyone had the best luck with?

Thanks in Advance, Kenny

2006 F-150 King Ranch 4x4 5.4 3v

 

Motorcraft sparkplugs SP507 or SP515 DONE

 

So what is the difference in the two plug numbers you listed?

Anyone got the part number for the Lisle removal tool?

 

Platinum verses double platinum. Check Rockauto.com for some of the best pricing.

Lisle removal tool part # LIS65600

 

How many miles on the fuel filter? Has the MAF ever been cleaned? Has the trottle body been cleaned? You may want to do those, too. If you are not familiar with how, do some looking at the index in the Articles and How To. There is a thread there on how to change the plugs that will have a lot of your answers as well.

 

Thanks Scooterdog, Ordered the double platinum from rock auto and the lisle tool also. I Will be doing them next weekend.