NGK 6421 - Alternative spark plugs
There are 32 replacement spark plugs for NGK 6421. The cross references are for general reference only, please check specifications for your application.
Compatible plug on Amazon
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Specifications for NGK 6421
- Thread diameter
- 14.0 mm
- Thread reach
- 7.8 mm
- Hex size
- 16 mm
NGK 6421 replacement spark plugs
- ACDelco CS41T
- ACDelco CS42T
- Autolite 2954 Buy from Amazon
- Autolite 2956 Buy from Amazon
- Autolite XST2956 Buy from Amazon
- Bosch 0241245539
- Bosch HR9LPX
- Bosch HS5E
- Bosch WAK225T3
- Brisk 3007
- Brisk 77316
- Brisk U15
- Carlton 71010
- Carlton CN6E
- Champion 5847(Ezstart)
- Champion 5851 Buy from Amazon
- Champion 851C Buy from Amazon
- Champion 851EZ
- Champion CCH851
- Champion DJ6J Buy from Amazon
- Champion DJ6JT04
- Champion RDJ6J
- Denso 6041
- Denso T22M-U
- Denso T22MU
- Denso WA22M
- Denso WA22M-U
- Denso WA22MU
- Eyquem 755CJT
- Motorcraft AF3NX
- NGK BM7F Buy from Amazon
- Prestolite 14F3N
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network and Amazon Associates.
Replacement spark plugs for NGK 6421 on Amazon
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