NGK 6668 - Alternative spark plugs

There are 10 replacement spark plugs for NGK 6668. The cross references are for general reference only, please check specifications for your application.

Compatible plug on Amazon

NGK Spark Plug LFR6A 6668 (Pack of 4) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm
NGK Spark Plug LFR6A 6668 (Pack of 4) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm
30.29$

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Specifications for NGK 6668

Thread diameter
14.0 mm
Thread reach
26.5 mm
Hex size
16 mm

NGK 6668 replacement spark plugs

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Replacement spark plugs for NGK 6668 on Amazon

SYKRSS LFR6A Iridium Spark Plugs 4 Pack Compatible with Yamaha WaveRunner FX FX Cruiser WaveRunner
SYKRSS LFR6A Iridium Spark Plugs 4 Pack Compatible with Yamaha WaveRunner FX FX Cruiser WaveRunner
USD 18.99
NGK Spark Plug LFR6A 6668 (Pack of 6) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm
NGK Spark Plug LFR6A 6668 (Pack of 6) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm
USD 39.95
NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm
NGK Spark Plug LFR6A 6668 (Pack of 8) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm
USD 55.12
NGK (6668) LFR6A Standard Spark Plug, Pack of 1
NGK (6668) LFR6A Standard Spark Plug, Pack of 1
USD 7.89
NGK Spark Plug LFR6A 6668 (Pack of 4) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm
NGK Spark Plug LFR6A 6668 (Pack of 4) Watercraft FX FZR FZS VX VXR VXS Reach 26.5mm Hex Size 16mm
USD 30.29
TORCH KH6RTC Spark Plug Replace for NGK (6668) LFR6A Spark Plug, for Bosch FR7ME Spark Plug, for
TORCH KH6RTC Spark Plug Replace for NGK (6668) LFR6A Spark Plug, for Bosch FR7ME Spark Plug, for
USD 7.99
Denso (4704) IKH20TT Iridium TT Spark Plug, (Pack of 1)
Denso (4704) IKH20TT Iridium TT Spark Plug, (Pack of 1)
USD 12.99
Denso IKH20TT Iridium TT Spark Plugs 4704-4 PK
Denso IKH20TT Iridium TT Spark Plugs 4704-4 PK
USD 24.76
NEW 1PCS - Denso (3381) K20HR-U11 Traditional Spark Plug
NEW 1PCS - Denso (3381) K20HR-U11 Traditional Spark Plug
USD 11.68
Denso (3381) K20HR-U11 Traditional Spark Plug, Pack of 2
Denso (3381) K20HR-U11 Traditional Spark Plug, Pack of 2
USD 12.56
SET (6) NEW K20HR-U11 90919-01235 spark plug Replacement For Toyota 4Runner FJ Cruiser Tundra
SET (6) NEW K20HR-U11 90919-01235 spark plug Replacement For Toyota 4Runner FJ Cruiser Tundra
USD 23.07
6 PCSNEW -- DENSO #3381 -- U-GROOVE - Standard Spark Plugs -- K20HR-U11
6 PCSNEW -- DENSO #3381 -- U-GROOVE - Standard Spark Plugs -- K20HR-U11
USD 42.93

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