i was always one to use Oem especially with my Grand National as it was very sensitive to being tinkered with, but this is my 11 year old "new" truck that I put maybe 5k a year on...i was looking to get rid of the raw fuel smell so i didn't get my wife or kids sick when they are in it..when im by myself i drive with the drivers window down no matter what the temp...glad i was able to get rid of that tick, because it really was driving me nuts especially in a drive thru

 

Actually, many of the Duralast parts are made for AutoZone by reputable companies, many who manufacture for Ford and GM.

I used Motocraft parts on my '04 F150, almost exclusively when it came to the hard parts on the motor (especially the sensors). But one major area I went aftermarket on were the COP's. True, I had a hard time stomaching the $450+ price tag for eight COPs. I ended up using MSD "Streetfire" COPs for half the price. I'm just hoping that decision doesn't come back to bite me in the butt, but so far so good.

 

MSD is a performance brand. Considered to be an upgrade.

 

New boots all of them clean wells out before pulling plugs . You have the 04 to 08 style black straight boots . Stay with sp546 mc ,do a hosp clean install . Use a very small amount of dielectric grease on boot ends. Use carb cleaner to clean tip area of spark plug in cyl as to not crack new plugs . Carb cleaner helps dissolve carbon . .Torque wrench plugs in 25 to 28 foot pounds to stop loose plugs and blowby . These are alum threads so be gentle . Bad boots cause a lot of misfires and they are cheap . . Start all plugs by fingers carefully and if it was cleaned out properly it will go in easy and fully . Clean all cop contacts ,corrosion is a big problem . 60 k is all you should get out of plugs and boots . Bad plugs and shorts can damage to PCM outputs and cats .