Last summer my son and I had an 04 Scab (Mine) and a 05 Scab (His) both with the 5.4 we had heard about the breakage problem so we went together and bought 16 E3.70 spark plugs and the spark plug removal tool. We did his spark plugs and broke 3 installed the E3's and it ran fine. Never got around to putting mine in. Now I traded my 04 for a 2010 Screw with the 5.4. Now my question is will the E3.70 plugs fit in my new truck? I have looked on summit racing and jegs but cant find the answer I'm looking for. So I have turned to this fourm for help. Thanks Cruiser

 

No, they will not. The 2010 has the revised heads. Use Motorcraft SP509's.

 

No, different heads. Several have had problems with the E#s, let us know what mileage your son son them.

 

Ok Thanks guys guess I have some E3's to sell LOL Bluejay they didn't increase his mpg at all, he changed them with only 48K he was just scared about the breakage so we replaced them, he thought it felt more responsive but I didn't feel anything different. Thank you for your input to my question.

 

let us know how long them E3's last. Most guys are lucky to get 20,000 miles before they start misfiring..

 

On the 3v's......black cop boots are found on the unrevised heads....sp515

Brown cop boots are on the revised heads....sp509