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⚡ Ignite your ride 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 engineering that improves fuel efficiency and acceleration. Designed for motorcycles and small engines, these plugs offer quick starts and reliable performance backed by decades of Autolite expertise.
| ASIN | B000CBQUJC |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #702,924 in Automotive ( See Top 100 in Automotive ) #3,799 in Automotive Replacement Spark Plugs |
| Brand | Autolite Iridium Ultra |
| Brand Name | Autolite Iridium Ultra |
| Compatible with Vehicle Type | Motorcycle |
| Core Material | Copper |
| Customer Reviews | 4.8 out of 5 stars 535 Reviews |
| Gap Size | 2 Inches |
| Global Trade Identification Number | 00009100004130 |
| Included Components | 4 spark plugs |
| Item Type Name | Copper Non-Resistor Spark Plug |
| Item Weight | 8 Ounces |
| Manufacturer | FRAM |
| Manufacturer Part Number | 437-4PK |
| Manufacturer Warranty Description | Lifetime Limited Warranty |
| Model Number | 437-4PK |
| OEM Equivalent Part Number | 437-4PK |
| Thread Size | M14-1.25mm |
| Top Material Type | Alloy Steel |
| UPC | 009100004130 |
| Unit Count | 4.0 Count |
| 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
2 days ago