Nippon Denso IW‑Series Spark Plugs
Iridium Performance. Proven Karting Reliability.
The Denso IW‑series is one of the most trusted spark plug ranges in karting, thanks to its ultra‑fine 0.4 mm iridium centre electrode, fast ignition, and excellent durability under race heat. Whether you’re running Rotax, X30, KA100, or a high‑revving 2‑stroke package, the IW range delivers consistent spark energy and fewer misfires across changing weather and track conditions.
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🔥 Available Heat Ranges (IW20–IW34)
The number indicates heat range—higher number = hotter running engine
| IW24 | Cold days, cooler climates | Faster heat-up, ideal for winter tuning. |
| IW27 | Standard Rotax Max choice | Most common all‑rounder for mixed conditions. |
| IW29 | Hot days, heavy load | Helps control plug temperature in summer heat. |
| IW31 | IAME Cadet / very hot conditions | Used when engines consistently run hot. |
| IW34 | Extreme heat | For peak‑summer or highly stressed engines. |
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Order Processing Time:
Orders are usually processed within 24-48 hours after the order has been placed.
Custom or special order items may take longer to process, typically 3-5 business days.
Shipping Methods:
Standard Shipping (3-7 business days)
Expedited Shipping (2-3 business days)
Express Shipping (1-2 business days)
Packaging:
Rest assured that all items will be securely and safely packaged to prevent any damage during transit. Fragile or high-value parts will be packaged with additional protective materials, such as bubble wrap or foam padding.
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Shipping rates vary based on the size, weight, and destination of the package. You can view the estimated shipping costs for your order during the checkout process before placing your order.
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International Shipping:
We ship worldwide! Please note that international shipping rates and delivery times may vary based on destination. Customers are responsible for any customs fees, import taxes, or additional charges that may apply.
