SKU: 12721470148

Sleeved Spark Plug Wires for SBC over valve cover, HEI - 31351

Sale price$139.92 Regular price$155.47
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Ships within 48 hours · Estimated delivery Sep 21 - Sep 26

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Description

Sleeved Spark Plug Wires for SBC over valve cover, HEI - 31351Overview: The MSD 8. 5mm Super Conductor is the ultimate performance wire! Its extremely low resistance combined with the ability to suppress Electro Magnetic Interference is a combination that defies the common laws of physics. Less resistance means more energy is going to make it to the spark plug to ignite the air fuel mixture. The Super Conductor uses a copper alloy conductor resulting in less than 50 ohms per foot of wire! This ensures that the

Overview:

The MSD 8.5mm Super Conductor is the ultimate performance wire! Its extremely low-resistance combined with the ability to suppress Electro Magnetic Interference is a combination that defies the common laws of physics. Less resistance means more energy is going to make it to the spark plug to ignite the air/fuel mixture. The Super Conductor uses a copper alloy conductor resulting in less than 50 ohms per foot of wire! This ensures that the most energy possible makes it to the spark plug. By helically winding the conductor around a special core, we are able to produce a highly effective choke to keep the EMI inside the wire and away from other electronics. This combination is encased in a heavy duty sleeve that will withstand abrasion and high temperatures. Cap off each end with our Dual Crimp Terminals and you have the best wire available. Equipped with high temp silicone-fiberglass sleeving for the harshest race conditions that protects wires up to 1,000 °F.

Features:

    Application:

    Year Make Model Submodel Engine Size
    Universal

    Specs:

    Boot Material Silicone
    Brand MSD
    Color Black
    Emission Code 5
    Product Type Spark Plug Wire Set
    Resistance 40-50 Ohms Per Foot
    Sleeved Yes
    Spark Plug Boot Angle 90 Degree
    Warranty Limited 1 Year Warranty
    Wire Diameter 8.5mm
    Wire Series 8.5 Super Conductor
    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 12721470148

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    4.5 ★★★★★
    Based on 18 reviews
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    A
    Verified Purchase
    Amazon Customer
    Bozeman, US
    ★★★★★ 5
    👍🏼👍🏼
    Color: Blue
    Great product! I really like this item I would definitely recommend it to get the job done !
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 25, 2026
    W
    Verified Purchase
    White Zombie
    Grantham, US
    ★★★★★ 5
    Perfect fit.
    Size: 1" x 1" x 1"
    Fits perfect in a 2025 Toyota Tacoma high quality good performance.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 10, 2026
    S
    Verified Purchase
    Sam
    Natrona Heights, US
    ★★★★★ 5
    Better Than OEM – Worth the Upgrade
    Size: 1" x 1" x 1"
    The K&N filter is a big step up from the standard Toyota air filters and OEM replacements. Installation was quick and easy, and the fit is perfect. I’ve noticed smoother airflow and better throttle response compared to the stock filter. The best part is that it’s washable and reusable, so it’s a long-term investment instead of constantly buying replacements. Definitely a smarter choice for anyone who wants performance and value over the typical paper filters.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on August 25, 2025
    A
    Verified Purchase
    Amazon Customer
    Carnegie, US
    ★★★★★ 5
    Fits 2024 Land Cruiser 1958
    Size: 1" x 1" x 1"
    Easy to install. Perfect fit.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 3, 2026
    K
    Verified Purchase
    K
    New York, US
    ★★★★★ 5
    Does the job, economical and a perfect fit
    Size: 1" x 1" x 1"
    Bought exactly 1 year ago for 3rd Gen Tundra. So far, it really does the job. At first I didn’t realize how awesome it was until I had to remove and clean it yesterday. Although I keep my truck immaculate inside and out, after 1 years use, the filter had become extremely filthy and the air had an old mildew, vomit, stank smell. When clean and set for fresh air, I can only faintly notice diesel exhaust smells from those in front of me. I also notice little to no dust accumulation on my dash and flat surfaces. In my opinion the K&N cabin filter kit is an essential tool for cleaning this filter. K&N made the filter, so I would imagine that they know how to clean and refresh it properly. By the way, refresh solution is nearly fragrance free. I bought the refresh kit at a big box auto supply and it came in a mostly black box instead of the white box as sold on here. Don’t know if that means the formulation has changed or not.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 2, 2025

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