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Product Information

Product Details
Part No. HT1
Warranty Details (4 YR REPLACEMENT IF DEFECTIVE)
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:
  • 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
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