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Sierra 18-8820-1 Premium Marine Spark Plug Wire Set 8-Cylinder EST

Manufacturer

Sierra

<p>For nearly six decades, Sierra has established itself as one of the marine industry's most trusted names in aftermarket engine and drive parts. Founded as a specialized marine parts manufacturer, Sierra has grown into a comprehensive supplier of replacement components, instrumentation, and accessories for both recreational and commercial boating applications. Operating from their 300,000-square-foot distribution center in Litchfield, Illinois, Sierra serves boat owners and marine technicians worldwide with an extensive catalog of parts engineered specifically for the harsh saltwater environment.</p><h3>Marine Engine Excellence</h3><p>Sierra's reputation was built on delivering precision-engineered internal engine components and drive system parts that meet or exceed OEM specifications. Their <a href="/7570-sierra-engine-gasket-set-5404">engine gasket sets</a> provide critical sealing solutions for inboard and outboard motors, while their <a href="/7570-sierra-engine-complete-assembly-15341">engine complete assemblies</a> offer comprehensive replacement options for major overhauls. Each component undergoes rigorous testing to ensure reliability in demanding marine conditions, from corrosion resistance to temperature cycling performance.</p><h3>Instrumentation and Monitoring Systems</h3><p>Accurate instrumentation is essential for boat operators to monitor engine health and prevent costly breakdowns on the water. Sierra's comprehensive line of <a href="/7570-sierra-gauges-200483">gauges</a> includes everything from fuel pressure and temperature indicators to voltmeters and trim gauges, all designed with marine-grade materials that withstand vibration, moisture, and UV exposure. Their <a href="/7570-sierra-tachometer-gauge-1488">tachometer gauges</a> deliver precise RPM readings critical for optimizing engine performance and fuel efficiency. Supporting these instruments, Sierra's <a href="/7570-sierra-gauge-resistor-47908">gauge resistors</a> ensure proper signal conditioning and accurate readings across various sensor types and engine configurations.</p><h3>Expanded Product Portfolio</h3><p>In 2022, Sierra significantly broadened its scope beyond traditional marine engine parts to encompass a wider range of boating accessories and even outdoor power equipment components. This strategic expansion brought established marine brands like Shields and Moeller under the Sierra umbrella, creating a one-stop resource for marine maintenance and replacement parts. The company now offers fuel systems, electrical components, battery charging solutions, and NMEA electronics alongside their traditional engine parts lineup.</p><h3>Quality Backed by Industry-Leading Warranties</h3><p>What sets Sierra apart in the crowded aftermarket marine parts market is their commitment to standing behind every component they manufacture. Their warranty coverage extends beyond simple part replacement—it includes shop labor, haul-out fees, towing charges, and related incidental costs should a warrantied part fail. This comprehensive protection reflects the company's confidence in their manufacturing processes and quality control standards. For boat owners facing repairs far from shore or mechanics working on customer vessels, this peace of mind is invaluable. Whether you're maintaining an outboard motor, rebuilding an inboard engine, or upgrading your boat's instrumentation, Sierra's decades of marine industry experience and commitment to quality make them a reliable choice for keeping your vessel running at peak performance.</p>

Part Number

118-8820-1
07/12/2036 7:38 AM
Sale Price

$82.57

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Sierra 18-8820-1 is a premium MagForce marine spark plug wire set designed for 8-cylinder engines with EST electronic ignition systems, compatible with OMC and Volvo Penta sterndrive applications. This set replaces OEM part number 503754 and is engineered specifically for GM 5.0L-8.2L marine engines.

Wire Configuration:

  • Spark plug wire lengths: (3) 42", (2) 38", (2) 27", and (1) 32"
  • Coil wire length: (1) 14"

Premium Construction Features:

  • Kevlar core for maximum durability and long life
  • Durable stainless steel wound conductor for maximum horsepower and engine performance
  • Premium silicone jacketing and boots for ultimate high temperature protection
  • Superior RFI suppression for the most sensitive electronic systems
  • Corrosion resistant stainless steel spark plug and distributor terminals for maximum conductivity

Sierra marine ignition products are engineered to meet or exceed original equipment specifications while withstanding the harsh marine environment. This wire set features 90-degree plug boots and is designed for universal fit on compatible 8-cylinder marine engines with EST electronic ignition systems.

Decent

PERFECT!!!

Nice and ez

Product looks good and delivery was faster than expected. Thanks

Got exactly what I ordered, at a great price. Arrived as schedule.I'm a very satisfied customer

2x the system hung up after a long wait

Great Job

Thank you

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