Autolite HT15 High Thread Spark Plug, Pack of 1

Product Review

Unique, patented design that results in more durability and greater power from a more compressive seal, improved heat transfer and more focused ignition power. OE design provides consistent optimal performance. One-piece ground shield strap for improved heat transfer. Platinum fine wire design provides improved fuel efficiency, lower emissions and improved horsepower.

Product Features

Unique, patented design that results in more durability and greater power from a more compressive seal, improved heat transfer and more focused ignition power
OE Design provides consistent optimal performance
One-piece ground shield strap for improved heat transfer
Platinum fine wire design provides improved fuel efficiency, lower emissions and improved horsepower
Designed specifically for Fords 4.6L, 5.4L and 6.8L 3-valve engines

Customer Reviews

Average Customer Review

(2 customer reviews)

Excellent Performance - Long Lasting - Premium OEM Replacement, July 6, 2011

good2go32 - See all my reviews

Amazon Verified Purchase(What's this?)

This review is from: Autolite HT15 High Thread Spark Plug, Pack of 1 (Automotive)

I highly recommend these spark plugs to fellow owners of Ford F-150's with the 3 valve engines. I have both a 4.6 liter and a 5.4 liter F-150 and run this spark plug in both. I switched from the OEM to these on a friends recommendation and results are all positive. I immediately noticed improvements in performance at acceleration from a stop and at freeway speeds, more torque when towing , a moderate increase in gas mileage of 1.5 miles per gallon and a long service life (100,000k and changing only because its recommended). From what i understand, you cant go wrong with OEM Motorcraft plugs as well, but this plug is a better value and a performance upgrade.

0 of 7 people found the following review helpful

number of plugs, October 23, 2007

David G. Conte "Fire24" (Boston) - See all my reviews

It would be nice if the ad for these told you how many are included in the price!!!!!! 1/ 4/ 8/ 10 ?????????