{"product_id":"jdmspeed-iridium-spark-plug-wire-kit-for-chevy-gmc-5-3l-6-2l-red-8-cylinder-long-life","title":"JDMSPEED Iridium Spark Plug \u0026 Wire Kit for Chevy\/GMC 5.3L–6.2L — Red 8‑Cylinder, Long‑Life","description":"\u003cp\u003e\u003cstrong\u003eJDMSPEED 3186 iridium spark plugs with M8-48322 plug wires are a complete 8-cylinder ignition replacement kit engineered to restore reliable spark performance for many Chevy, GMC, Cadillac and related V8 engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your truck or SUV with a 5.3L, 6.0L or 6.2L V8 is exhibiting rough idle, reduced throttle response, or you simply need a full ignition tune-up, this kit supplies eight JDMSPEED iridium plugs plus eight high-strength M8-48322 wires. The package matches several OEM and aftermarket reference numbers so it fits a wide range of GM models from mid-2000s to early 2010s. Components are built for heat resistance, low electrical loss and long life while keeping installation straightforward for DIYers and professional techs alike.\u003c\/p\u003e\n\n\u003ch3\u003eWill these plugs and wires fit my Chevy Silverado, Sierra, or Yukon?\u003c\/h3\u003e\n\u003cp\u003eCompatibility covers many GM V8 applications. The kit replaces OEM part numbers such as 12680072, 12621258 and others listed, and is specified for model years and vehicle families noted in the product features.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for Chevy Silverado 1500\/2500HD\/3500HD (2007–2014) and similar GM trucks.\u003c\/li\u003e\n  \u003cli\u003eFits GMC Sierra 1500\/2500HD\/3500HD (2008–2013) and Yukon models (2008–2014).\u003c\/li\u003e\n  \u003cli\u003eAlso compatible with Suburban, Avalanche, Tahoe, Colorado, Corvette, Express, Savana, Canyon, Envoy, Escalade and Pontiac G8 in listed years.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these iridium plugs and wires improve ignition performance?\u003c\/h3\u003e\n\u003cp\u003eIridium tips provide a consistently strong spark with reduced electrode wear compared to standard plugs, and the M8 wires are built to minimize electrical resistance and withstand engine heat. Together they help stabilize combustion, which can improve idle smoothness and throttle response when the rest of the ignition system is sound.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium center electrode for longer life and stable firing.\u003c\/li\u003e\n  \u003cli\u003eDouble silicone jacket and fiberglass layer on wires for tear and heat resistance.\u003c\/li\u003e\n  \u003cli\u003eLow-resistance construction to reduce energy loss between coil and plug.\u003c\/li\u003e\n  \u003cli\u003eComplete 8-plug and 8-wire kit for full-cylinder service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eInstallation follows standard spark plug and wire replacement procedures — remove old wires one at a time, replace plugs with the correct gap and torque, then fit new boots. No special programming is needed; however, confirm plug gaps and torque values for your exact engine and use anti-seize or dielectric compound only as recommended by a technician.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTorque plugs to manufacturer specs; check gap if required.\u003c\/li\u003e\n  \u003cli\u003eReplace wires one-by-one to preserve firing order and routing.\u003c\/li\u003e\n  \u003cli\u003eInspect coil packs, boots and ignition components for damage during service.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation recommended if you lack basic engine experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these parts direct replacements for OEM numbers like 12680072 and 48322?\u003c\/h3\u003e\n\u003cp\u003eYes — the JDMSPEED kit is intended as a like-for-like replacement for many of the listed OEM and aftermarket part numbers. Cross-reference the included part numbers against your vehicle’s service manual or parts database to ensure exact match.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplaces several iridium plug references (3186 and related numbers listed).\u003c\/li\u003e\n  \u003cli\u003eWire set replaces M8-48322 and equivalent part codes including 7831.\u003c\/li\u003e\n  \u003cli\u003eSold as a complete 8-plug and 8-wire package for V8 engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: mechanics, fleet managers, and DIY truck owners who need a full-cylinder ignition refresh for GM 5.3L, 6.0L and 6.2L V8 engines. Choose this kit when you want an affordable iridium plug upgrade and a durable wire set that together reduce ignition loss, simplify replacement, and match common OEM numbers for straightforward installation.\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: Do these plugs require a different gap than OEM?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check your vehicle service manual; many iridium plugs come pre-gapped but verify and adjust to manufacturer specs before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I replace just the plugs and keep my old wires?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: You can, but replacing both plugs and wires together ensures matched performance and avoids weak links in the ignition system.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"JDMSPEED","offers":[{"title":"Default Title","offer_id":67586953576633,"sku":"B0DHZRL37Y","price":113.02,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/jdmspeed-front-packaging-iridium-plugs-wires.jpg?v=1790497874","url":"https:\/\/redleafauto.ca\/products\/jdmspeed-iridium-spark-plug-wire-kit-for-chevy-gmc-5-3l-6-2l-red-8-cylinder-long-life","provider":"Redleaf Auto","version":"1.0","type":"link"}