Ignitions and Electrical› Ignition Components

Mountune

NGK LTR71X-II Iridium Spark Plugs

$59.00

SKU: 2536-SPS-726

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Mountune NGK LTR71X-II Iridium Spark Plug Set is a performance upgrade designed for EcoBoost engines operating under extreme conditions. These spark plugs are one step colder than original equipment, making them ideal for high-boost applications and modified vehicles. The set includes four spark plugs that are pre-gapped by Mountune to an optimized setting.

By utilizing optimized spark plugs, you can ensure maximum performance, prevent misfires, and maintain a smooth idle, especially in engines with higher boost or increased tuning levels.
Show original supplier description
The Mountune NGK LTR71X-II Iridium Spark Plug Set offers a performance enhancement for EcoBoost engines that experience demanding operating conditions, such as high cylinder pressures and increased boost levels. This set includes four NGK LTR71X-II iridium spark plugs, which are one step colder than the original equipment plugs. This makes them particularly suitable for vehicles running additional boost pressure and common bolt-on modifications. Mountune pre-gaps each set to an optimized setting, ensuring easier installation and optimal performance right out of the box. Key features of this spark plug set include smoother acceleration and suitability for high-boost street use. The applications for this specific part number (2536-SPS-726) are the 2013-2018 Ford Focus ST, 2016-2018 Ford Focus RS, 2019-2023 Ford Ranger, 2014-2019 Ford Fiesta ST, and the 2017-2020 Ford F150 Raptor. Customers must choose the correct option based on their specific application when ordering, as the pre-gapped settings vary (.026" for Focus RS, .028" for Focus ST/Ranger, and .030" for Fiesta ST and F150 Raptor). It is important to note that this part is designed and intended for off-highway application only, and installation on a public road may violate U.S. and Canadian laws and regulations regarding emissions and motor vehicle safety standards.

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

BrandMountune
Part Number2536-SPS-726
CategoryIgnitions and Electrical
5,000+ Trusted brands
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(760) 282-4645 hello@motormia.co

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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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