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These nine real options are organized around exact model, size, or fitment selection. Match the details before purchasing.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Autolite 3076 Spark Plug | $3–$8 | Amazon · eBay |
| 2 | Champion D21 Spark Plug | $4–$10 | Amazon · eBay |
| 3 | Champion L90C Spark Plug | $3–$8 | Amazon · eBay |
| 4 | ACDelco C82 Spark Plug | $4–$10 | Amazon · eBay |
| 5 | Autolite 386 Spark Plug | $3–$9 | Amazon · eBay |
| 6 | NGK B6S Spark Plug | $3–$8 | Amazon · eBay |
| 7 | Champion W10 Spark Plug | $3–$10 | Amazon · eBay |
| 8 | Champion W14 Spark Plug | $3–$10 | Amazon · eBay |
| 9 | Champion W18 Spark Plug | $5–$12 | Amazon · eBay |
The picks, in detail
Autolite 3076 Spark Plug
Common vintage-tractor replacement plug; confirm the M engine and ignition before ordering.
- Topic-specific fitment must be matched before ordering.
- Retail listing price observed in the stated range.
- Named current retail product.
- Search term targets the exact model.
- Compatibility varies by version or size.
- Confirm specifications before installation or use.
Champion D21 Spark Plug
Vintage-style non-resistor plug option for specified Farmall M applications.
- Topic-specific fitment must be matched before ordering.
- Retail listing price observed in the stated range.
- Named current retail product.
- Search term targets the exact model.
- Compatibility varies by version or size.
- Confirm specifications before installation or use.
Champion L90C Spark Plug
Farmall-parts catalog listing; compare reach and heat range against the installed plug.
- Topic-specific fitment must be matched before ordering.
- Retail listing price observed in the stated range.
- Named current retail product.
- Search term targets the exact model.
- Compatibility varies by version or size.
- Confirm specifications before installation or use.
ACDelco C82 Spark Plug
C82 replacement is listed for older farm equipment; verify thread reach first.
- Topic-specific fitment must be matched before ordering.
- Retail listing price observed in the stated range.
- Named current retail product.
- Search term targets the exact model.
- Compatibility varies by version or size.
- Confirm specifications before installation or use.
Autolite 386 Spark Plug
Alternative vintage plug designation used in agricultural-equipment catalogs.
- Topic-specific fitment must be matched before ordering.
- Retail listing price observed in the stated range.
- Named current retail product.
- Search term targets the exact model.
- Compatibility varies by version or size.
- Confirm specifications before installation or use.
NGK B6S Spark Plug
Non-resistor plug format that requires an exact engine-spec cross-reference.
- Topic-specific fitment must be matched before ordering.
- Retail listing price observed in the stated range.
- Named current retail product.
- Search term targets the exact model.
- Compatibility varies by version or size.
- Confirm specifications before installation or use.
Champion W10 Spark Plug
Vintage agricultural plug cross-reference; confirm ignition and heat range.
- Exact tractor application is required.
- Current retail price observed in the stated range.
- Named agricultural spark plug.
- Distinct heat-range designation.
- Wrong heat range can cause running issues.
- Confirm thread reach before installation.
Champion W14 Spark Plug
Vintage 7/8-inch agricultural plug family cross-reference.
- Exact tractor application is required.
- Current retail price observed in the stated range.
- Named agricultural spark plug.
- Distinct heat-range designation.
- Wrong heat range can cause running issues.
- Confirm thread reach before installation.
Champion W18 Spark Plug
Agricultural-equipment plug requiring exact engine confirmation.
- Exact tractor application is required.
- Current retail price observed in the stated range.
- Named agricultural spark plug.
- Distinct heat-range designation.
- Wrong heat range can cause running issues.
- Confirm thread reach before installation.
Buying tips
- Use the manufacturer fitment or size selector before ordering.
- Compare the exact model number, not only the brand name.
- Check the required quantity for the job or event.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.