Autolite APP104 Double Platinum Automotive Replacement Spark Plugs (4 Pack)

I've always used the recommended Autolite Double-Platinum plugs in Ford 4.6L modular engines. They provide great performance and I've never had any issues removing or installing them. Normal plugs get eaten very fast by these engines, due to their high-voltage ignition system, but double-platinums are good for 50-100K miles. Notes: > Your older Autolite Double-Plats may only be threaded half the barrel, whereas these updated versions have a fully threaded barrel to prevent plug blowouts. They do not seat deeper and will not cause piston interference issues, like many incorrectly assume. It's the same barrel length, only fully threaded and causes no issues. > Always check the gap on new plugs and regap to spec if necessary. > Before pulling plugs on 4.6L modular engines, always blow out the plug wells with compressed air to prevent any debris in the wells from falling into the combustion chamber when you pull the plugs. > With aluminum heads, always remove/install plugs with the engine cold. > Do not use anti-seize on the threads of these plugs, according to the Autolite website's documentation & installation instructions. It's not needed with these plugs, like they were on older plugs, and will affect the torque specification. I pulled these plugs from a 4.6L that were installed in 2007 with no issue or threads being crossed or yanked out...but I was very careful & slow about the removal/installation, as one should always be with aluminum heads. > Torque all plugs to spec, not by feel, to prevent plugs being blown out or threads being pulled when removed years later. > Lastly, whatever plugs you buy, always check out the manufacturer's website, as well as the vehicle's service manual, for details about proper plug removal/installation for your application to prevent issues, blowouts, crossed or pulled threads, etc.

Good quality for price

I changed my smartplugs for my Ford. Escape 2003. And these were a good product, no more misfiring happening

Funcionando bien en mi Ford Escape 2006 2.3L

I read that this engine can be picky about plugs and these are OEM so I went with them. Price was good, they went in well and seem to be working fine. Also replaced coil with a Motorcraft and wires with AC delco. So far, all good.

Excelente en mi Ford Explorer 2007

I,ve been told don't buy Autolite , but I installed them on my 2009 Focus and haven't had any problems. Work fine.

New oil filter, and fluid change, New ignition coils plus these New spark plugs..... car runs flawless. Runs very efficiently with better throttle response. Now new tires with balance alignment. Car well run like new.

i ordered 2 packs one of them (4 spark plugs) looked a bit dirty as if they were test fitted and returned , i just regapped them and they were fine

What can you say, they are great replacement sparkplugs. They were gapped correctly right out of the box (all checked and resistance checked - you don't want to install a bad plug). Not sure why the 4 pack was selling for a buck less then the individual plugs but not complaining - 8 double platinum plugs for 35 bucks.

Great Pricing Excellent product

Cheaper than most places I checked, installed three years ago and still working.

Fit perfectly and excellent price. Very Pleased.