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  2. Auto Parts
  3. Ignition
  4. Secondary Ignition
  5. Spark Plug
  6. NGK 6684

NGK 6684 Spark Plug

NGK 6684 Spark Plug Image 1
NGK 6684 Spark Plug Image 2
NGK 6684 Spark Plug Image 3
NGK 6684 Spark Plug Image 4
NGK 6684 Spark Plug

NGK
Brand:NGK
Part Number: 6684
UPC: 00087295166840
Weight: 0.06 lbs
Condition:New



On Sale:

$7.53

Availability:
16 in Stock
Warehouse: US-4
Quantity:

Product Information

Description:

Get the NGK 6684 Spark Plug for your vehicle. Buy now and secure your purchase online!

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.

Features and Benefits:

  • IRIDIUM ALLOY CENTER ELECTRODE: Iridium's density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
  • RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
  • SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
  • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
  • TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
  • TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal

Specifications:

Center Electrode Core Material:
Copper
Center Electrode Tip Material:
Iridium
Electrical Terminal Type:
Removable Nut
Ground Configuration:
Standard
Ground Electrode Core Material:
Nickel
Ground Electrode Quantity:
1
Ground Electrode Tip Design:
Taper Cut
Hex Size:
13/16 in.
Insulator Height:
55.00 mm
Manufacturer Heat Range:
8
Part Number:
BPR8EIX
Pre-Gap Size:
.032 in.
Reach:
.75 in.
Resistance:
5000.0 Ohm
Seat Type:
Flat
Stock Number:
6684
Thread Diameter:
14.00 mm
Autolite #:
XS61
Autolite #:
XS61DP
Mitsubishi #:
MZ602087
NGK #:
6684
Nissan #:
BY480-BPR8E
Country of Origin:
JP

Manufacturer Warranty:

2 Months

Select a vehicle to narrow NGK 6684 Spark Plug fitment info!

Last Updated: 09/02/2024

Years Vehicle Per Vehicle Fit NotesFitment Notes

2007

 

2006

 

2005

 

2007

 

2006

 

2005

 
Aprilia Mojito Custom 50

-L U/K
1
 
Iridium IX Spark Plug
Gap 0.032
 

Aprilia Mojito Custom 50



-L U/K Iridium IX Spark Plug
Gap 0.032

1 Per Vehicle

2004

 

2004

 
Aprilia Mojito Custom 50

-L U/K
1
 
Iridium IX Spark Plug
Piaggia Engine
Gap 0.032
 

Aprilia Mojito Custom 50



-L U/K Iridium IX Spark Plug
Piaggia Engine
Gap 0.032

1 Per Vehicle

2018

 

2017

 

2016

 

2018

 

2017

 

2016

 
Cobra CX50 FWE

-L U/K
1
 
Iridium IX Spark Plug
Gap 0.024
 

Cobra CX50 FWE



-L U/K Iridium IX Spark Plug
Gap 0.024

1 Per Vehicle

2018

 

2017

 

2018

 

2017

 
Cobra CX50 P3

-L U/K
1
 
Iridium IX Spark Plug
Gap 0.024
 

Cobra CX50 P3



-L U/K Iridium IX Spark Plug
Gap 0.024

1 Per Vehicle

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 
Cobra CX50-JR

-L U/K
1
 
Iridium IX Spark Plug
Gap 0.024
 

Cobra CX50-JR



-L U/K Iridium IX Spark Plug
Gap 0.024

1 Per Vehicle

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2010

 
Cobra CX50-SR

-L U/K
1
 
Iridium IX Spark Plug
Gap 0.024
 

Cobra CX50-SR



-L U/K Iridium IX Spark Plug
Gap 0.024

1 Per Vehicle

1968

 

1968

 
Ferrari 275 GT

3.3L V12 Gas SOHC
12
 
Iridium IX Spark Plug
Gap 0.025
 

Ferrari 275 GT



3.3L V12 Gas SOHC Iridium IX Spark Plug
Gap 0.025

12 Per Vehicle

1968

 

1967

 

1966

 

1965

 

1964

 

1968

 

1967

 

1966

 

1965

 

1964

 
Ferrari 275 GTB

3.3L V12 Gas SOHC
12
 
Iridium IX Spark Plug
Gap 0.025
 

Ferrari 275 GTB



3.3L V12 Gas SOHC Iridium IX Spark Plug
Gap 0.025

12 Per Vehicle

1969

 

1968

 

1969

 

1968

 
Ferrari Dino 206 GT

2.0L V6 Gas DOHC
6
 
Iridium IX Spark Plug
Gap 0.025
 

Ferrari Dino 206 GT



2.0L V6 Gas DOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

1973

 

1972

 

1971

 

1970

 

1969

 

1973

 

1972

 

1971

 

1970

 

1969

 
Ferrari Dino 246 GT

2.4L V6 Gas DOHC
6
 
Iridium IX Spark Plug
Gap 0.025
 

Ferrari Dino 246 GT



2.4L V6 Gas DOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

1973

 

1972

 

1973

 

1972

 
Ferrari Dino 246 GTS

2.4L V6 Gas DOHC
6
 
Iridium IX Spark Plug
Gap 0.025
 

Ferrari Dino 246 GTS



2.4L V6 Gas DOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

1989

 

1988

 

1989

 

1988

 
Kawasaki KD80

-L U/K
1
 
Iridium IX Spark Plug
Gap 0.032
 

Kawasaki KD80



-L U/K Iridium IX Spark Plug
Gap 0.032

1 Per Vehicle

1990

 

1989

 

1990

 

1989

 
Maserati 430i

2.8L V6 Gas SOHC Turbo
6
 
Iridium IX Spark Plug
Gap 0.028
 

Maserati 430i



2.8L V6 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.028

6 Per Vehicle

1987

 

1987

 
Maserati Biturbo

2.5L V6 Gas SOHC Turbo
6
 
Iridium IX Spark Plug
Gap 0.028
Fuel Sys: CARB
 

Maserati Biturbo



2.5L V6 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.028
Fuel Sys: CARB

6 Per Vehicle

1986

 

1985

 

1986

 

1985

 
Maserati Biturbo

2.5L V6 Gas DOHC Turbo
6
 
Iridium IX Spark Plug
Gap 0.028
 

Maserati Biturbo



2.5L V6 Gas DOHC Turbo Iridium IX Spark Plug
Gap 0.028

6 Per Vehicle

1984

 

1984

 
Maserati Biturbo

2.5L V6 Gas SOHC Turbo
6
 
Iridium IX Spark Plug
Gap 0.028
 

Maserati Biturbo



2.5L V6 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.028

6 Per Vehicle

1983

 

1983

 
Maserati Biturbo

2.0L V6 Gas SOHC Turbo
6
 
Iridium IX Spark Plug
Gap 0.028
 

Maserati Biturbo



2.0L V6 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.028

6 Per Vehicle

2004

 

2003

 

2002

 

2004

 

2003

 

2002

 
Polaris Freedom

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris Freedom



-L U/K Iridium IX Spark Plug
Gap 0.028

2 Per Vehicle

1997

 

1997

 
Polaris Hurricane

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris Hurricane



-L U/K Iridium IX Spark Plug
Gap 0.028

2 Per Vehicle

2001

 

2000

 

2001

 

2000

 
Polaris Pro 1200

-L U/K
3
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris Pro 1200



-L U/K Iridium IX Spark Plug
Gap 0.028

3 Per Vehicle

1997

 

1997

 
Polaris SL 1050

-L U/K
3
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris SL 1050



-L U/K Iridium IX Spark Plug
Gap 0.028

3 Per Vehicle

1997

 

1997

 
Polaris SL 700

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris SL 700



-L U/K Iridium IX Spark Plug
Gap 0.028

2 Per Vehicle

1997

 

1996

 

1997

 

1996

 
Polaris SL 780

-L U/K
3
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris SL 780



-L U/K Iridium IX Spark Plug
Gap 0.028

3 Per Vehicle

1997

 

1996

 

1997

 

1996

 
Polaris SL 900

-L U/K
3
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris SL 900



-L U/K Iridium IX Spark Plug
Gap 0.028

3 Per Vehicle

2001

 

2000

 

1999

 

2001

 

2000

 

1999

 
Polaris SLH

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris SLH



-L U/K Iridium IX Spark Plug
Gap 0.028

2 Per Vehicle

1997

 

1996

 

1997

 

1996

 
Polaris SLT 780

-L U/K
3
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris SLT 780



-L U/K Iridium IX Spark Plug
Gap 0.028

3 Per Vehicle

1999

 

1999

 
Polaris SLTH

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris SLTH



-L U/K Iridium IX Spark Plug
Gap 0.028

2 Per Vehicle

1999

 

1998

 

1997

 

1996

 

1999

 

1998

 

1997

 

1996

 
Polaris SLTX

-L U/K
3
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris SLTX



-L U/K Iridium IX Spark Plug
Gap 0.028

3 Per Vehicle

1999

 

1999

 
Polaris SLX

-L U/K
3
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris SLX



-L U/K Iridium IX Spark Plug
Gap 0.028

3 Per Vehicle

1996

 

1995

 

1996

 

1995

 
Polaris SLX 780

-L U/K
3
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris SLX 780



-L U/K Iridium IX Spark Plug
Gap 0.028

3 Per Vehicle

2004

 

2003

 

2002

 

2001

 

2000

 

2004

 

2003

 

2002

 

2001

 

2000

 
Polaris Virage

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.028
 

Polaris Virage



-L U/K Iridium IX Spark Plug
Gap 0.028

2 Per Vehicle

1989

 

1988

 

1987

 

1986

 

1989

 

1988

 

1987

 

1986

 
Porsche 911

3.3L H6 Gas SOHC Turbo
6
 
Iridium IX Spark Plug
Gap 0.024
 

Porsche 911



3.3L H6 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.024

6 Per Vehicle

1977

 

1976

 

1977

 

1976

 
Porsche 911

3.0L H6 Gas SOHC Turbo
6
 
Iridium IX Spark Plug
Gap 0.024
 

Porsche 911



3.0L H6 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.024

6 Per Vehicle

1975

 

1975

 
Porsche 911

2.7L H6 Gas SOHC
6
 
Iridium IX Spark Plug
Gap 0.028
8th VIN Digit: 4
 

Porsche 911



2.7L H6 Gas SOHC Iridium IX Spark Plug
Gap 0.028
8th VIN Digit: 4

6 Per Vehicle

1974

 

1974

 
Porsche 911

2.7L H6 Gas
6
 
Iridium IX Spark Plug
Gap 0.028
8th VIN Digit: 4
 

Porsche 911



2.7L H6 Gas Iridium IX Spark Plug
Gap 0.028
8th VIN Digit: 4

6 Per Vehicle

1974

 

1974

 
Porsche 911

2.7L H6 Gas SOHC
6
 
Iridium IX Spark Plug
Gap 0.028
Eng: 644
 

Porsche 911



2.7L H6 Gas SOHC Iridium IX Spark Plug
Gap 0.028
Eng: 644

6 Per Vehicle

1971

 

1970

 

1971

 

1970

 
Porsche 911

2.2L H6 Gas SOHC
6
 
Iridium IX Spark Plug
Gap 0.024
 

Porsche 911



2.2L H6 Gas SOHC Iridium IX Spark Plug
Gap 0.024

6 Per Vehicle

1979

 

1978

 

1979

 

1978

 
Porsche 930

3.3L H6 Gas SOHC Turbo
6
 
Iridium IX Spark Plug
Gap 0.028
 

Porsche 930



3.3L H6 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.028

6 Per Vehicle

2022

 

2021

 

2022

 

2021

 
Ski-Doo Backcountry Sport 600 EFI

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.032
 

Ski-Doo Backcountry Sport 600 EFI



-L U/K Iridium IX Spark Plug
Gap 0.032

2 Per Vehicle

2022

 

2021

 

2022

 

2021

 
Ski-Doo Expedition Sport 600 EFI

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.032
 

Ski-Doo Expedition Sport 600 EFI



-L U/K Iridium IX Spark Plug
Gap 0.032

2 Per Vehicle

2022

 

2021

 

2022

 

2021

 
Ski-Doo MX Z Sport 600 EFI

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.032
 

Ski-Doo MX Z Sport 600 EFI



-L U/K Iridium IX Spark Plug
Gap 0.032

2 Per Vehicle

2022

 

2021

 

2022

 

2021

 
Ski-Doo Renegade Sport 600 EFI

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.032
 

Ski-Doo Renegade Sport 600 EFI



-L U/K Iridium IX Spark Plug
Gap 0.032

2 Per Vehicle

2022

 

2021

 

2022

 

2021

 
Ski-Doo Skandic Sport 600 EFI

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.032
 

Ski-Doo Skandic Sport 600 EFI



-L U/K Iridium IX Spark Plug
Gap 0.032

2 Per Vehicle

2022

 

2021

 

2022

 

2021

 
Ski-Doo Skandic WT 600 EFI

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.032
 

Ski-Doo Skandic WT 600 EFI



-L U/K Iridium IX Spark Plug
Gap 0.032

2 Per Vehicle

2022

 

2021

 

2022

 

2021

 
Ski-Doo Tundra LT 600 EFI

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.032
 

Ski-Doo Tundra LT 600 EFI



-L U/K Iridium IX Spark Plug
Gap 0.032

2 Per Vehicle

2022

 

2022

 
Ski-Doo Tundra Sport 600 EFI

-L U/K
2
 
Iridium IX Spark Plug
Gap 0.032
 

Ski-Doo Tundra Sport 600 EFI



-L U/K Iridium IX Spark Plug
Gap 0.032

2 Per Vehicle

1983

 

1982

 

1981

 

1983

 

1982

 

1981

 
Yamaha XJ650L Turbo Seca

-L U/K
1
 
Iridium IX Spark Plug
Gap 0.032
 

Yamaha XJ650L Turbo Seca



-L U/K Iridium IX Spark Plug
Gap 0.032

1 Per Vehicle

1985

 

1985

 
Yamaha XJ700 Maxim

-L U/K
1
 
Iridium IX Spark Plug
Gap 0.032
 

Yamaha XJ700 Maxim



-L U/K Iridium IX Spark Plug
Gap 0.032

1 Per Vehicle