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Autolite High Thread Spark Plug: Enhanced Durability & Focused Ignition
4 year warranty
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Product Information
Product Details
Part No. HT1
Warranty Details (4 Year Warranty)
Autolite High Thread Pro plugs are expertly crafted for Ford 3V engines, offering a patented design that ensures peak performance and reliability. Engineered with a fine-wire platinum center electrode and an extra-long special projection, these plugs deliver focused ignition power and extended service life. The ground strap enhances heat transfer, while the proprietary design boosts heat management, fouling resistance, and dielectric strength. Featuring a nickel-plated shell, they provide superior corrosion protection, ensuring durability in demanding conditions. The tapered seat and thread positioning above the cylinder head create a compressive seal for optimal engine efficiency. Perfect for performance-grade applications, these spark plugs are designed to maximize power, improve ignition precision, and maintain consistent engine operation.
Product Features:
Product Features:
- Engineered with a fine-wire platinum design that provides more focused ignition power and longer service life.
- The ground strap provides improved heat transfer over standard J-gap plugs.
- Its proprietary design improves performance for heat management, fouling resistance & increased dielectric strength.
- The position of the thread above the cylinder head seating allows for a more compressive seal.
- Designed with a nickel-plated shell that delivers increased protection against corrosion.
Specifications
Center Electrode Core Material:
Copper
Center Electrode Design:
Fine Wire
Center Electrode Projection:
Extra-Long Special
Center Electrode Tip Material:
Platinum
Electrical Terminal Type:
Non-Removable Nut
Electrode Tip Material:
Platinum
Grade Type:
Performance
Ground Electrode Core Material:
Nickel
Ground Electrode Quantity:
1
Ground Electrode Tip Design:
Standard
Ground Electrode Tip Material:
Nickel
Hex Size:
5/8 in
Hex Type:
Hex
Indexed:
No
Insulator Material:
Ceramic
Manufacturer Heat Range:
11
Pre-Gap Size:
0.035 in
Reach:
0.867 in
Resistor:
Suppressor
Resistor Type:
Yes
Seat Type:
Tapered
Skirt:
Yes
Thread Diameter:
16 mm
Tip Configuration:
Power
Washer(s) Included:
No
Wrench Diameter:
9/16 in
3.8 out of 5
15 Customer Reviews
40% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
9
4 Stars
1
3 Stars
1
2 Stars
1
1 Star
3
Pros
1
Durable
1
Easy To Install
1
Hot or cold be carefu
Cons
1
Difficult To Install
1
Breaks in head
Best Uses
2
Everyday Driving
Describe Yourself
1
Casual Driver
1
Competitive Driver
1
Ford owner for 35 years
1
Truck Enthusiast
Most Liked Positive Review
I will not buy again. Will buy Champion one piece plugs .
Two piece ford spark plugs are problematic . I bought autolite platinums because of the price. But will buy Champion one piece plugs next time. These plugs are coated with nickle to help with the corrosion of lower plug.
Most Liked Negative Review
very poorly designed plug.
This is the worst designed plug that Autolite and Ford has come up with. i have been working on vehicles, mostly Fords due to I am a FORD Man for 42 years. When attempting to remove the plugs for replacement the lower section broke off in the block. [...] The manual says to let the motor cool before removing. seems that 12 hrs of cooling wasn't enough. at [$] a piece, these plugs are a piece of junk.
Reviewed by 15 Customers
very poorly designed plug.
This is the worst designed plug that Autolite and Ford has come up with. i have been working on vehicles, mostly Fords due to I am a FORD Man for 42 years. When attempting to remove the plugs for replacement the lower section broke off in the block. [...] The manual says to let the motor cool before removing. seems that 12 hrs of cooling wasn't enough. at [$] a piece, these plugs are a piece of junk.
Bottom Line No, I would not recommend to a friend
New Removal Procedure
Ford updated removal procedure for the spark plugs are þo have the engine warm. The engine should not be HOT or COLD, from prolong sitting. The ideal way is to drive the car to the store and back. Wait until the engine is warm to the touch. This way is the best to NOT have plug breakage issues. Hope this helps. P.S. There is a special tool to remove the broken plug in the head.
Would definitely recommend these plugs!
Verified Buyer -
Bought these plugs for my 2005 Mustang GT. It runs great, like it did when I bought it new!
Still the best fot the 3v...
Verified Buyer -
Great running plugs...lets hope they stay in one piece not like the motorcrafts.
sparkplug removal
these plugs are very fragile . do not drop or cross thread or snap the plud in the heads . very bad desind by ford and pparts provider
Bottom Line No, I would not recommend to a friend
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