Brands Vehicles
Lowest Prices
Free Returns
Online Since 2009
JOIN GEARS TO SAVE 5%
Shop All Brands Shop All Vehicles

  2. Auto Parts
  3. Ignition
  4. Secondary Ignition
  5. Spark Plug
  6. NGK 5666

NGK 5666 Spark Plug

NGK 5666 Spark Plug Image 1
NGK 5666 Spark Plug Image 2
NGK 5666 Spark Plug Image 3
NGK 5666 Spark Plug Image 4
NGK 5666 Spark Plug

NGK
Brand:NGK
Part Number: 5666
UPC: 00087295156667
Weight: 0.03 lbs
Condition:New



On Sale:

$8.37

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

Product Information

Description:

Get the NGK 5666 Spark Plug for your vehicle. Buy now and secure your purchase online!

NGK Standard spark plugs (in the iconic NGK 'yellow box' packaging) are a proven OE cornerstone and technology customers have relied on for decades. Engineered specifically for OE applications, NGK Standard spark plugs provide OE quality nickel alloy reliable performance and design. NGK's legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance, while triple gasket sealing prevents combustion gas leakage. Solid 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties.

Features and Benefits:

  • ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction nickel alloy center electrode provides consistent performance
  • COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
  • NGK's OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance
  • RECOMMENDED USAGE: Best for vehicles with OE nickel alloy plugs, not recommended on vehicles with factory precious metal plugs
  • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
  • 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:
Nickel
Electrical Terminal Type:
Stud
Ground Configuration:
Standard
Ground Electrode Core Material:
Nickel
Ground Electrode Quantity:
1
Ground Electrode Tip Design:
Standard
Hex Size:
5/8 in.
Insulator Height:
50.00 mm
Manufacturer Heat Range:
8
Part Number:
CR8EH-9
Pre-Gap Size:
.036 in.
Reach:
.75 in.
Resistance:
5000.0 Ohm
Seat Type:
Flat
Stock Number:
5666
Thread Diameter:
10.00 mm
Champion Spark Plug #:
RGU94C
DENSO Auto Parts #:
4127
DENSO Auto Parts #:
U24FER9
Honda #:
98059-58916
NGK #:
5666
Torch #:
B8RH
Country of Origin:
JP

Manufacturer Warranty:

2 Months

Select a vehicle to narrow NGK 5666 Spark Plug fitment info!

Last Updated: 09/02/2024

Years Vehicle Per Vehicle Fit NotesFitment Notes

1990

 

1989

 

1990

 

1989

 
Honda CB400F CB-1

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda CB400F CB-1



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 
Honda CB900F 919

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda CB900F 919



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 
Honda CBR900RR

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda CBR900RR



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 
Honda CHF50 Metropolitan

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda CHF50 Metropolitan



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2005

 

2004

 

2003

 

2002

 

2005

 

2004

 

2003

 

2002

 
Honda CHF50P Metropolitan II

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda CHF50P Metropolitan II



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 
Honda CRF150R

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda CRF150R



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Honda CRF150R

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda CRF150R



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2019

 

2019

 
Honda CRF150R Expert

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda CRF150R Expert



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 
Honda CRF150R Expert

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda CRF150R Expert



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Honda CRF150R Expert

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda CRF150R Expert



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 
Honda FSC600 Silver Wing

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda FSC600 Silver Wing



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2013

 

2012

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 
Honda FSC600A Silver Wing ABS

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda FSC600A Silver Wing ABS



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2020

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 

2020

 

2019

 

2018

 

2017

 

2016

 

2015

 

2014

 

2013

 

2012

 

2011

 
Honda NPS50 Ruckus

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda NPS50 Ruckus



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 
Honda NPS50 Ruckus

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda NPS50 Ruckus



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 

2009

 

2008

 

2007

 

2006

 

2005

 

2004

 
Honda NPS50S Ruckus

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda NPS50S Ruckus



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2015

 

2015

 
Honda PCX150

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda PCX150



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2010

 

2010

 
Honda SH150i

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda SH150i



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2003

 

2003

 
Honda ST1100

-L U/K
4
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda ST1100



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

4 Per Vehicle

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

1991

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

1991

 
Honda ST1100

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda ST1100



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2003

 

2003

 
Honda ST1100 ABS

-L U/K
4
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda ST1100 ABS



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

4 Per Vehicle

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 
Honda ST1100 ABS

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda ST1100 ABS



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 
Honda VF750C Magna

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda VF750C Magna



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

1996

 

1995

 

1996

 

1995

 
Honda VF750CD Magna Deluxe

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda VF750CD Magna Deluxe



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

1991

 

1990

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

1991

 

1990

 
Honda VFR750F Interceptor

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda VFR750F Interceptor



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

1990

 

1990

 
Honda VFR750R RC30

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda VFR750R RC30



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2001

 

2000

 

1999

 

1998

 

2001

 

2000

 

1999

 

1998

 
Honda VFR800 Interceptor

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda VFR800 Interceptor



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

1990

 

1989

 

1990

 

1989

 
Honda VTR250 Interceptor

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda VTR250 Interceptor



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 
Honda XR250R

-L U/K
1
 
Standard Spark Plug
Gap 0.036
Actual OE Manufacturer
 

Honda XR250R



-L U/K Standard Spark Plug
Gap 0.036
Actual OE Manufacturer

1 Per Vehicle