NGK stk 4221 - Alternative spark plugs

There are 13 replacement spark plugs for NGK stk 4221. The cross references are for general reference only, please check specifications for your application.

Specifications for NGK stk 4221

Thread diameter
14.0 mm
Thread reach
19.5 mm
Hex size
20.8 mm

NGK stk 4221 replacement spark plugs

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Replacement spark plugs for NGK stk 4221 on Amazon

Autolite 2526 Copper Resistor Automotive Replacement Spark Plug (1 Pack)
Autolite 2526 Copper Resistor Automotive Replacement Spark Plug (1 Pack)
USD 18.50

Replacement spark plugs for NGK stk 4221 on Ebay

For Mazda RX-7 1980 Set of 4 Spark Plugs NGK Standard Resistor BR8ET # 6612
For Mazda RX-7 1980 Set of 4 Spark Plugs NGK Standard Resistor BR8ET # 6612
USD 42.95
NGK Standard Spark Plug Set 4 Pieces 6612 For Mazda RX-7 1.1 R2 1980
NGK Standard Spark Plug Set 4 Pieces 6612 For Mazda RX-7 1.1 R2 1980
USD 40.95
2 pc NGK 6612 BR8ET Standard Spark Plugs for WR3CTC W25EBR W25EB W25EA ov
2 pc NGK 6612 BR8ET Standard Spark Plugs for WR3CTC W25EBR W25EB W25EA ov
USD 20.74
10 pc NGK 6612 BR8ET Standard Spark Plugs for WR3CTC W25EBR W25EB W25EA og
10 pc NGK 6612 BR8ET Standard Spark Plugs for WR3CTC W25EBR W25EB W25EA og
USD 79.80
Beck/Arnley 176-5124, BR8ET NGK Spark Plug NOS
Beck/Arnley 176-5124, BR8ET NGK Spark Plug NOS
USD 6.98
New Vintage Beck/Arnley NGK Spark Plug BR8ET 176-5124.
New Vintage Beck/Arnley NGK Spark Plug BR8ET 176-5124.
USD 6.99
One 1 Nippondenso W25EBR Spark Plug New
One 1 Nippondenso W25EBR Spark Plug New
USD 14.73
10 pc NGK 6612 BR8ET Standard Spark Plugs for WR3CTC W25EBR W25EB W25EA og
10 pc NGK 6612 BR8ET Standard Spark Plugs for WR3CTC W25EBR W25EB W25EA og
USD 79.80
2 pc NGK 6612 BR8ET Standard Spark Plugs for WR3CTC W25EBR W25EB W25EA ov
2 pc NGK 6612 BR8ET Standard Spark Plugs for WR3CTC W25EBR W25EB W25EA ov
USD 20.74
DENSO SPARK PLUGS W25EBR -LOT of 8
DENSO SPARK PLUGS W25EBR -LOT of 8
USD 16.00
DENSO STANDARD Spark Plugs W25EBR 3103 Set of 4
DENSO STANDARD Spark Plugs W25EBR 3103 Set of 4
USD 56.77
SPARK PLUGS ABARTH 1100 1150 1600 750 850 MASERATI A6 MASERATI A6G MATRA DJET6
SPARK PLUGS ABARTH 1100 1150 1600 750 850 MASERATI A6 MASERATI A6G MATRA DJET6
USD 11.99

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