XtcJohn

im doing my own spark plugs for the first time and im slightly confused on which to get, im using motorcraft of course, according to the ford fitment guide, I used my VIN by the way, it says to use either sp405 or sp507, now like always i google stuff and it doesnt even mention sp405, it tells me to use sp515, Now i ask because theres a huge price difference, i can get sp405 for like 25 30 for the set and sp515 for like 80ish...also what about sp507?.now which is the right to get? thanks!!

SCORGE

515

650NutKase

515

650NutKase

i think the 405 was an option for the previous gen. Since you have an 2004, it may be giving you options for both the 11th gen, and the 2004 heritage.

Also, SP515 replaced SP507. Either/or should be ok I would think. Not too sure, I have the brown coil boots, so my plugs are the easy ones

grss429

sp-515, make sure to get new boots/springs too!

make sure to read over this too

https://www.f150forum.com/f72/how-sp...-3v-v8-116291/

also get a extractor tool before u start the job!

do a quick search read up on it