Niterra 7447 BUZ8H Surface Gap Spark Plug

The Niterra 7447 BUZ8H is a standard spark plug featuring a 98% pure copper core that delivers increased heat dissipation for more reliable starts and reduced risk of overheating. This specialty surface gap spark plug is nearly immune to pre-ignition and usually requires a special high energy ignition system, though it can be susceptible to fouling in colder applications and may be necessary in high compression applications.

Key Features:

• 14mm thread size with 0.500 inch reach and 13/16 inch hex wrench size
• Heat range 8 with 0.016 inch preset gap and flat gasket seat
• High-grade alumina silicate ceramic insulator for superior strength and heat transfer
• Nickel alloy electrode tip with copper core material
• Cold-rolled threads to prevent cross-threading and damage to cylinder heads
• Trivalent plating eliminates need for anti-seize and corrugated ribs prevent flashover
• Triple seals prevent combustion gas leakage

Niterra (formerly NGK Spark Plug Co.) is a world-renowned manufacturer specializing in spark plugs and related products for internal combustion engines, with products sold under the trusted NGK Ignition Parts brand. This spark plug includes an inductive resistor with an approximate value of 35 ohms.

Installation Torque Specifications:

• Cast iron cylinder heads: 18-25.3 lb-ft
• Aluminum cylinder heads: 18-21.6 lb-ft