{"product_id":"rlp-hei-universal-spark-plug-wire-set-8mm-black-silicone-jacket-90-boots-replaces-msd-5553","title":"RLP HEI Universal Spark Plug Wire Set 8mm - Black Silicone Jacket, 90° Boots | Replaces MSD 5553","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe RLP HEI Universal Spark Plug Wire Set combines rugged construction with practical performance. An 8.0mm spiral core delivers steady spark transmission, while a conductive carbon black center helps minimize electrical noise. A stainless steel terminal design resists corrosion, and a high temperature silicone jacket guards against heat, oil, and abrasion. This set is built for reliability in everyday driving and weekend projects alike, with eight wires ready to install straight out of the box.\u003c\/p\u003e\n\u003ch3\u003eKey features and benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConductor design\u003c\/strong\u003e - 8.0mm spiral wrap core for consistent spark delivery across cylinders.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoot material\u003c\/strong\u003e - Silicone boots provide flexibility and heat tolerance in tight engine bays.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsulation\u003c\/strong\u003e - High temperature jacket resists heat, oil, and abrasion for longer life.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability\u003c\/strong\u003e - Tightly woven fiberglass braids increase pull strength and help retain connectors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTerminals\u003c\/strong\u003e - Stainless steel spark plug terminals offer corrosion resistance and reliable contact.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectrical noise control\u003c\/strong\u003e - Conductive carbon black core helps suppress interference for cleaner ignition pulses.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReal-world use\u003c\/h3\u003e\n\u003cp\u003eIdeal for both classic builds and modern engines, this set supports smooth starts and steady performance under varied conditions. The 90-degree boots help routing around compact engine layouts, while the silicone jacket stays resilient after long drives or hot engine sessions. Expect a confident feel at the wheel with consistent ignition pairs and reduced sparkle interruption during high rpm bursts.\u003c\/p\u003e\n\u003ch3\u003eInstallation and fit\u003c\/h3\u003e\n\u003cp\u003eDesigned for quick, hassle-free installation, the wires come ready to install. The 8-wire package ensures you have coverage for multi-coil or HEI configurations, with routing flexibility and a secure fit that holds up to repeated ignition events.\u003c\/p\u003e\n\u003ch3\u003eWhat’s in the box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e8 x 8.0mm silicone spark plug wires\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNote: Always verify fitment with your vehicle’s ignition system to ensure compatibility and optimal performance.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What does the RLP HEI Universal Spark Plug Wire Set replace?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replaces MSD 5553; compatible with most HEI distributor systems, with eight wires included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What benefits can I expect from the carbon black core and silicone jacket?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Carbon core helps reduce interference; silicone jacket offers heat and abrasion resistance for longer life.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"RLP","offers":[{"title":"Default Title","offer_id":42480876519509,"sku":"B0D8VZ3YKG","price":70.93,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/rlp-hei-universal-spark-plug-wire-set-8mm.jpg?v=1778338878","url":"https:\/\/plentytorque.co.uk\/products\/rlp-hei-universal-spark-plug-wire-set-8mm-black-silicone-jacket-90-boots-replaces-msd-5553","provider":"PlentyTorque","version":"1.0","type":"link"}