Cross reference › Gates 6721 › vs NGK SPARK PLUGS 3657
Verified equivalent — same part, cross-referenced by Orderflow. Compare specs below, or open either part's full cross-reference.
| Gates 6721 | NGK SPARK PLUGS 3657 | |
|---|---|---|
| Type | Belt | Electrical |
| Length | 531 mm | 3.125984 mm |
| Width | 10 mm | 0.748031 mm |
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Data is a cross-reference guide — always verify against the manufacturer specification for your application.