NGK IX Iridium Spark Plug Box of 4 (Part Number 6684) for Porsche 911 and Performance Vehicles

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug. NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. PORSCHE 911 1986 1974 1971, ATV - 1984-1982 YAMAHA, M/C - 2004-2000 BETAMOTOR, 1986-1976 BMW, 1982 KAWASAKI, 1993 MOTO GUZZI, 1995-1978 SUZUKI, 2007-1974 YAMAHA, PWC - 1998-1994 POLARIS (COLDER HEAT RANGE THAN OE)

• RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
• Trivalent metal plating for superior anti-corrosion and anti-seizing properties
• Outstanding acceleration, high fuel efficiency and durability
• Fine iridium tip ensures durable and consistent spark

The NGK IX Iridium Spark Plugs are engineered for high-performance applications and enthusiast drivers seeking reliable ignition and superior engine response. Featuring a fine iridium tip, these plugs provide outstanding ignition efficiency, enhanced acceleration, and improved fuel economy. Their durable design ensures consistent performance across a wide range of driving conditions, making them an excellent upgrade from standard nickel alloy spark plugs. The trivalent metal plating offers superior anti-corrosion and anti-seizing properties, extending the lifespan of the plugs and maintaining optimal performance over time. Designed specifically for vehicles such as Porsche 911 models from 1971 to 1989, as well as various motorcycles, ATVs, and PWC, these plugs are suitable for high-performance and modified engines needing a colder heat range than original equipment. The tapered cut ground electrode enhances starting, idling, and throttle response, providing drivers with a smoother and more responsive driving experience. The iridium alloy's high melting point and six times harder durability than platinum ensure longevity and reliable spark delivery, even under demanding conditions. For those seeking even greater performance, NGK offers the Ruthenium HX plug as a recommended upgrade. These plugs are part of NGK’s commitment to quality and precision, making them an ideal choice for automotive enthusiasts and professional mechanics alike.

Features:

• Designed for high-performance and modified engines for improved ignition and throttle response

• Fine iridium tip provides durable and consistent spark for enhanced acceleration and fuel efficiency

• Trivalent metal plating offers superior anti-corrosion and anti-seizing properties

• Tapered cut ground electrode improves starting, idling, and throttle response

• Compatible with a wide range of vehicles including Porsche 911 models from 1971 to 1989 and various motorcycles, ATVs, and PWC

• Colder heat range than OE for demanding, high-performance applications

• Durable iridium alloy with a melting point that withstands extreme engine conditions

• Recommended as an upgrade from OEM nickel alloy spark plugs for enthusiasts and performance applications

Fitment:
1964 Ferrari 275 GTB Base
1965 Ferrari 275 GTB Base
1966 Ferrari 275 GTB Base
1967 Ferrari 275 GTB Base
1968 Ferrari 275 GT Base
1968 Ferrari 275 GTB Base
1968 Ferrari Dino 206 GT Base
1969 Ferrari Dino 206 GT Base
1969 Ferrari Dino 246 GT Base
1970 Ferrari Dino 246 GT Base
1970 Porsche 911 S
1971 Ferrari Dino 246 GT Base
1971 Porsche 911 S
1972 Ferrari Dino 246 GT Base
1972 Ferrari Dino 246 GTS Base
1973 Ferrari Dino 246 GT Base
1973 Ferrari Dino 246 GTS Base
1974 Porsche 911 Carrera
1975 Porsche 911 Carrera
1976 Porsche 911 Turbo Carrera
1977 Porsche 911 Turbo Carrera
1978 Porsche 930 Turbo
1979 Porsche 930 Turbo
1981 Yamaha XJ650L Turbo Seca Base
1982 Yamaha XJ650L Turbo Seca Base
1983 Maserati Biturbo Base
1983 Yamaha XJ650L Turbo Seca Base
1984 Maserati Biturbo Base
1985 Maserati Biturbo Base
1985 Yamaha XJ700 Maxim Base
1986 Maserati Biturbo Base
1986 Porsche 911 Turbo Carrera
1987 Maserati Biturbo Base
1987 Porsche 911 Turbo Carrera
1988 Kawasaki KD80 Base
1988 Porsche 911 Turbo Carrera
1989 Kawasaki KD80 Base
1989 Maserati 430i Base
1989 Porsche 911 Turbo Carrera
1990 Maserati 430i Base
1996 Polaris Hurricane Base
1996 Polaris SL 780 Base
1996 Polaris SL 900 Base
1996 Polaris SLT 780 Base
1996 Polaris SLTX Base
1996 Polaris SLX 780 Base
1997 Polaris Hurricane Base
1997 Polaris SL 1050 Base
1997 Polaris SL 700 Base
1997 Polaris SL 780 Base
1997 Polaris SL 900 Base
1997 Polaris SLT 780 Base
1997 Polaris SLTX Base
1998 Polaris SLTX Base
1999 Polaris SLH Base
1999 Polaris SLTH Base
1999 Polaris SLTX Base
1999 Polaris SLX Base
2000 Polaris PRO 1200 Base
2000 Polaris SLH Base
2000 Polaris Virage Base
2001 Polaris PRO 1200 Base
2001 Polaris SLH Base
2001 Polaris Virage Base
2002 Polaris Freedom Base
2002 Polaris Virage Base
2003 Polaris Freedom Base
2003 Polaris Virage Base
2004 Aprilia Mojito Custom 50 Base
2004 Polaris Freedom Base
2004 Polaris Virage Base
2005 Aprilia Mojito Custom 50 Base
2006 Aprilia Mojito Custom 50 Base
2007 Aprilia Mojito Custom 50 Base
2010 Cobra CX50-SR Base
2011 Cobra CX50-JR Base
2011 Cobra CX50-SR Base
2012 Cobra CX50-JR Base
2012 Cobra CX50-SR Base
2013 Cobra CX50-JR Base
2013 Cobra CX50-SR Base
2014 Cobra CX50-JR Base
2014 Cobra CX50-SR Base
2015 Cobra CX50-JR Base
2015 Cobra CX50-SR Base
2016 Cobra CX50 FWE Base
2016 Cobra CX50-JR Base
2016 Cobra CX50-SR Base
2017 Cobra CX50 FWE Base
2017 Cobra CX50 P3 Base
2017 Cobra CX50-JR Base
2017 Cobra CX50-SR Base
2018 Cobra CX50 FWE Base
2018 Cobra CX50 P3 Base
2018 Cobra CX50-JR Base
2018 Cobra CX50-SR Base

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 4