My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Autolite APP666 Double Platinum Spark Plug

(Ford Mustang 1979, Maverick 1977, Mustang II 1977-78, LTD 1977-79, Custom 500 1977, Fairmont 1978-79, Granada 1977-79, LTD II 1977-79 + 69 more models)

Manufacturer

Picture for manufacturer Fram

Part Number

APP666
11 reviews
Sale Price

$4.21

In Stock (10+)

delivery box

Usually delivered within 2 days

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Autolite APP666 Double Platinum spark plug features platinum-to-platinum firing that greatly decreases gap erosion, reduces misfires, and provides improved durability compared to standard plugs. This superior-performing spark plug provides preferred technology for DIS (Distributorless Ignition System) engines.

Key Features:

  • Full copper core electrode provides better performance in all conditions
  • Platinum enhanced high nickel alloy side electrode maintains precision gap and assures virtually no gap erosion for longer plug life
  • Necked-down center electrode fires quicker and cleaner with less voltage for easier starts and quicker acceleration
  • Super conductive Yttrium enhanced ground electrode provides superior heat transfer
  • 14mm thread diameter with 0.433 inch reach and tapered seat design
  • 16mm hex size for easy installation
  • Backed by a 5-year limited warranty

Autolite has been producing spark plugs since 1936, making it one of the most trusted and reliable brands for OE replacement spark plug needs. The APP666 delivers enhanced performance and extended service life for demanding automotive applications.

Products specifications

Fits

Ford Mustang 1979, Maverick 1977, Mustang II 1977-78, LTD 1977-79, Custom 500 1977, Fairmont 1978-79, Granada 1977-79, LTD II 1977-79; Cadillac DeVille 1980-82, Eldorado 1981-82, Seville 1981-82, Fleetwood 1980-82 + 65 more models

Very quick easy transaction. Recommend to anyone looking for auto accessories.

A week ago I ordered a H3RHG100C 1.4 lb Halotron fire extinguisher. I mentioned "a week ago" because that is how long it took from order to delivery across the U.S.!! Now that I look at the paperwork, it wasn't even a full week. Autoplicity is now my #1 parts supplier for my 2010 Camaro. They could not have been any better overall. Ordering, checkout, stock and shipping. All above and beyond my expectations Great site, great communication. A1 people.

good site,ordered monday recievied thursday

Extremely fast shipment and the best price on the internet. Highly recommended.

so far so good

Price is awesome. Definitely the lowest around, even lower than Amazon.

Great

Quick Purchase, very good.

Delivered as promised.

Easy to check out with Amazon!

Placed order on Tuesday late afternoon, item shipped next day. One of the fastest turn around times I expereniced online yet. Thank you

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy