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⚡ Ignite your drive with Autolite’s copper core power!
Autolite 437 Copper Non-Resistor Spark Plugs feature a full copper core electrode for superior thermal conductivity, a leak-proof copper-glass seal for enhanced durability, and precision construction that ensures quick starts, better fuel efficiency, and smooth acceleration. Trusted since 1936, these plugs deliver reliable performance tailored for vehicle-specific fits.
| ASIN | B000CBQUJC |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #57,285 in Automotive ( See Top 100 in Automotive ) #377 in Automotive Replacement Spark Plugs |
| Brand | Autolite Iridium Ultra |
| Core Material | Copper |
| Customer Reviews | 4.8 4.8 out of 5 stars (524) |
| Date First Available | May 1, 2008 |
| Exterior | Chrome |
| Global Trade Identification Number | 00009100004130 |
| Is Discontinued By Manufacturer | Yes |
| Item Weight | 8 ounces |
| Item model number | 437-4PK |
| Manufacturer | FRAM |
| Manufacturer Part Number | 437-4PK |
| Model | 437-4PK |
| Product Dimensions | 1 x 1 x 3.38 inches |
| Thread Size | M14-1.25mm |
| Top Material Type | Alloy Steel |
| UPC | 009100004130 |
| Vehicle Service Type | Motorcycle |
A**S
Great quality and fit
Perfect replacement for my tractor. Works so much better than the 15 year old ones in the tractor.
K**R
Great deal on spark plugs
Nice spark plugs, priced right, well packaged, and fast shipping.
T**L
Works great!
Installed in my 1939 9n that needed a little hotter plug. Starts and runs like a new tractor.
K**H
Ford 8n
Works
W**D
Misleading description
The description shows a package of four. Nothing says there's only one spark plug. I had to order three more spark plugs. The price is correct for one plug.
D**D
Exact fit
Price was good and the plugs were an exact fit.
G**R
Good product
Good plugs.good price
C**7
Good price
Price was good fast shipping
D**D
As described and on time
M**K
Use these in my Ford 8N works great
R**N
Perfect plug for the Ford 8ns
A**R
Exactly as described
W**Y
Works great started my tractor right off
Trustpilot
2 months ago
1 week ago