Ignitions and Electrical› Ignition Components

BRISK

Silver Racing Spark Plug

$17.50

SKU: QR15SL

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$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Easy — 1–2 hours

Overview

The Brisk QR15SL is a Silver Racing spark plug designed for high performance and alternative fuels. It features a smaller diameter silver core and a conventional open spark hook type earth electrode for enhanced ignition of high octane fuel mixtures.

Silver is used for its superior heat dissipation and conductivity, resulting in lower spark plug temperatures and a more powerful spark. This leads to a faster and better flame front and flame speed, enabling a smoother higher RPM range.
Show original supplier description
The Brisk Silver Racing QR15LS spark plug is engineered for tuned and race engines, as well as vehicles using alternative fuels such as CNG, LPG, Propane, E85 blend, Alcohol, LNG, Race Fuels, and Nitro. Its design prioritizes performance with a smaller diameter silver core and an open spark hook type earth electrode, which excels at igniting high octane fuel mixtures. The use of silver in the core electrode is critical due to its excellent thermal and electrical conductivity. This allows for rapid heat dissipation, maintaining a lower spark plug temperature and generating a more powerful spark. The resulting stronger spark promotes a faster and more efficient flame front, contributing to a smoother operation at higher RPMs and reduced wear on ignition components. Key features include the 1.5 mm Silver Wire Centre Electrode, which ensures proper firing even in the presence of fouling, a common issue with standard plugs. It is also suitable for older vehicles with weaker ignition systems or excessive oil consumption, as well as high RPM race engines that have limited time for ignition coil saturation. This spark plug has a service life of 30,000 km (18,000 miles) or 50 hours of racing. It is listed as a popular replacement for KIA 2.4L engines from 2011 onwards and may require a special thin wall spark plug socket for installation.

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.

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Specifications

BrandBRISK
Part NumberQR15SL
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.

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