Ignitions and Electrical› Ignition Components

HKS M-Series

M45XL Iridium Spark Plug

$130.00

SKU: HKS M45XL

In Stock
In Stock
Ships by Sep 13
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
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Overview

The HKS M45XL is a high-performance Iridium spark plug designed to handle advanced tuning. It provides improved ignition performance, durability, and resistance to carbon buildup.
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The HKS M-Series Super Fire Racing spark plugs, like the M45XL, are engineered for high-performance applications. These iridium plugs are built to manage advanced tuning levels, offering enhanced ignition performance, increased durability, and effective anti-carbon buildup properties. The M45XL features a 0.6mm Iridium Alloy Center Electrode, which reduces voltage requirements while boosting ignition performance and longevity. Complementing this is an Outer Electrode with a Platinum Chip, further enhancing durability and ignition capabilities. To combat misfires caused by carbon deposits after long idling or varied combustion conditions, the M45XL utilizes a Thermal Edge on the ceramic insulator that discharges to help decrease carbon buildup. Important Note: These spark plugs are considered off-road racing plugs and do not come with a warranty. Any warranty claims or issues must be handled directly with the manufacturer. This product is not necessarily vehicle-specific, and buyers should review specifications and verify compatibility for their application prior to ordering.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandHKS M-Series
Part NumberHKS M45XL
CategoryIgnitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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