IT16TT Denso TT Iridium Twin Spark Plug - 4713
Can replace Denso IT16 and NGK TR5IX
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Iridium and platinum technologies combine with Denso’s 360-degree laser welding process in Denso Twin-Tip Iridium to create a plug with a lifetime over 100,000 miles. TT or Twin-Tip technology promotes spark energy concentration and explosion, which translates into improved acceleration and economy. Iridium TT feature the world’s smallest 0.4mm iridium center electrode and 0.7mm needle tip ground electrode, which minimize spark interference and maximize ignitability, resulting in better power, torque and fuel economy. Denso’s patented iridium alloy has the highest iridium concentration, making it more durable and producing a dramatic improvement in spark plug life. Machine rolled threads prevent seizing or cross threading during installation and removal. 100% pre-fired to assure the highest quality possible. Purified alumina powder insulator provides exceptional strength and thermal conductivity. Five rib insulator prevents flashover. Copper-glass seal bonds center electrode and insulator for a gas-tight seal.
Thread Diameter 14mm
Thread Pitch 1.25mm
Seat Type Tapered
Reach 17.5mm (.689")
Hex Size 5/8" (16mm)
Terminal Type Solid
Gap .039" (1.0mm)
Center Electrode Material
Iridium Type
Fine Wire Size 0.4mm
Projection Projected
Ground Electrode Material Platinum
Specifications
Resistor Yes
Resistor Value 5k Ohm
Heat Range 16
Torque Specs Cast Iron: 7-15 lb. ft. Aluminum: 7-15 lb. ft.
Part Information
Brand Denso
Longevity 100k
IT16TT
IT 16TT
IT-16TT
IT16TT
IT16
TR5IX