{"product_id":"arp","title":"ARP 130-0203 Upper Rocker Cover Bolt Kit | 2004.5-2010 GM Sierra\/Silverado 2500HD\/3500HD 6.6L Duramax LLY\/LMM","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh strength 8740 chromoly steel construction\u003c\/li\u003e\n\u003cli\u003eDesigned for Duramax LLY and LMM engines\u003c\/li\u003e\n\u003cli\u003ePrecision rolled threads for consistent torque\u003c\/li\u003e\n\u003cli\u003eImproved clamping force over factory bolts\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish resists corrosion\u003c\/li\u003e\n\u003cli\u003eExact fit for rocker cover applications\u003c\/li\u003e\n\u003cli\u003eMaintains proper gasket sealing pressure\u003c\/li\u003e\n\u003cli\u003eReusable hardware for long term reliability\u003c\/li\u003e\n\u003cli\u003eEngineered for heavy duty diesel performance\u003c\/li\u003e\n\u003cli\u003eIncludes complete upper cover bolt set\u003c\/li\u003e\n\u003cli\u003eTrusted ARP manufacturing quality standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eLock Down Your Duramax Valvetrain With Confidence And Strength\u003c\/h4\u003e\n\u003cp\u003eWhen you are putting time into your Duramax, the last thing you want is to rely on weak factory hardware that can loosen up over time. This ARP upper rocker cover bolt kit is built for owners who care about long term reliability and want peace of mind every time they fire up their truck. Right away, you notice the difference in quality, with each bolt designed to deliver a more consistent and secure hold across the entire rocker cover. Additionally, this added clamping force helps maintain proper gasket sealing, which can prevent annoying leaks that show up when you least expect them. It is a simple upgrade, but one that pays off whether your truck is a daily driver or sees heavy towing use. What’s more, the reusable design means you are not constantly replacing hardware every time you service the top end. When you are working under the hood, having hardware you can trust just makes the whole job smoother. This is one of those upgrades that quietly does its job while protecting everything underneath.\u003c\/p\u003e\n\u003ch4\u003ePrecision Engineered Fasteners Built For Duramax Performance Demands\u003c\/h4\u003e\n\u003cp\u003eThis ARP 130-0203 bolt kit is specifically engineered for GM 6.6L Duramax LLY and LMM engines, ensuring proper fitment and reliable performance in demanding conditions. Each fastener is manufactured from high strength 8740 chromoly steel, a material known for its durability and resistance to stretching under load. Furthermore, the threads are precision rolled rather than cut, which improves fatigue strength and allows for more accurate torque readings during installation. The black oxide finish adds a layer of corrosion resistance, helping the bolts hold up in harsh engine bay environments where heat and moisture are constant factors. Additionally, the hardware is designed to provide even clamping force across the rocker cover, which is critical for maintaining gasket integrity over time. This becomes especially important in diesel applications where vibration and pressure cycles are more aggressive than gas engines. The kit includes all required bolts for the upper rocker cover, making installation straightforward without the need to source additional components. Altogether, it is a well thought out solution that supports both performance and long term engine durability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \u003c\/strong\u003e2004.5, 2005, 2006, 2007, 2008, 2009, 2010 GM Sierra\/Silverado 2500HD\/3500HD 6.6L Duramax LLY\/LMM\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOnly fits Duramax LLY and LMM engines\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for upper rocker cover use\u003c\/li\u003e\n\u003cli\u003eTorque specs must follow ARP guidelines\u003c\/li\u003e\n\u003cli\u003eARP lubricant recommended for accurate torque\u003c\/li\u003e\n\u003cli\u003eNot a universal bolt kit\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended for best results\u003c\/li\u003e\n\u003cli\u003eCheck gasket condition during installation\u003c\/li\u003e\n\u003cli\u003eEngine must be cool before installation\u003c\/li\u003e\n\u003cli\u003eVerify proper bolt sequence during tightening\u003c\/li\u003e\n\u003cli\u003eIdeal for maintenance or engine rebuilds\u003c\/li\u003e\n\u003cli\u003eCompatible with stock and aftermarket components\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":54045732208924,"sku":"ARP130-0203","price":56.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/40872637.jpg?v=1776355379","url":"https:\/\/www.alligatorperformance.com\/products\/arp","provider":"Alligator Performance","version":"1.0","type":"link"}