{"product_id":"arp-gm-duramax-6-6l-harmonic-balancer-bolt-kit","title":"ARP GM Duramax 6.6L Harmonic Balancer Bolt Kit","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003e129-2503\u003c\/span\u003e | \u003cstrong\u003eUPC:\u003c\/strong\u003e 672036046835\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eARP GM Duramax 6.6L Harmonic Balancer Bolt Kit 2001-2016 Chevy GMC HD Trucks\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eARP 129-2503 Harmonic Balancer Bolt Kit replaces the factory bolt on GM Duramax 6.6L diesel engines in 2001-2016 Chevrolet Silverado GMC Sierra heavy-duty trucks and vans. This kit prevents balancer slippage and failure in tuned high-horsepower applications with stock harmonic balancers. Engine builders rely on it for secure crankshaft-to-balancer attachment during extreme drag racing and towing.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eARP2000 Alloy Construction:\u003c\/strong\u003e Forged from high-tensile 8740 chromoly steel with over 220,000 psi strength to withstand 1000+ hp builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Kit Contents:\u003c\/strong\u003e Includes one M16 x 140mm main bolt one 12-point head nut and heavy-duty washer for full replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Torque Rating:\u003c\/strong\u003e Rated for 300 ft-lbs dry or 340 ft-lbs wet torque far beyond OEM specs for rock-solid hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Machined Threads:\u003c\/strong\u003e Perfect fit into crankshaft nose eliminates cross-threading and ensures even clamping load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OEM Replacement:\u003c\/strong\u003e Bolts in without modifications maintains stock balancer alignment and timing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eUse ARP Ultra-Torque assembly lube on threads and under nut for accurate torque.\u003c\/li\u003e\n\u003cli\u003eInspect harmonic balancer condition before installation replace if worn.\u003c\/li\u003e\n\u003cli\u003eCompact packaging allows fast shipping worldwide.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eRemove OEM bolt with impact tool torque new ARP bolt to 300-340 ft-lbs based on lubrication.\u003c\/li\u003e\n\u003cli\u003eCompatible with stock or aftermarket harmonic balancers no special tools needed beyond 12-point socket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2001-2016\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 2500 HD\u003c\/td\u003e\n\u003ctd\u003e6.6L Duramax Diesel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2001-2016\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 3500 HD\u003c\/td\u003e\n\u003ctd\u003e6.6L Duramax Diesel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2001-2016\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 2500 HD\u003c\/td\u003e\n\u003ctd\u003e6.6L Duramax Diesel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2001-2016\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 3500 HD\u003c\/td\u003e\n\u003ctd\u003e6.6L Duramax Diesel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2006-2016\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eExpress 3500\u003c\/td\u003e\n\u003ctd\u003e6.6L Duramax Diesel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2006-2016\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSavana 3500\u003c\/td\u003e\n\u003ctd\u003e6.6L Duramax Diesel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose ARP?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProven in NHRA Top Fuel and Pro Stock engines for decades.\u003c\/li\u003e\n\u003cli\u003eEvery fastener exceeds SAE and military specs for durability.\u003c\/li\u003e\n\u003cli\u003eCustom heat treatment process delivers consistent performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Will this fit my 2011-2016 LML Duramax Silverado?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Yes ARP 129-2503 fits all 2001-2016 GM 6.6L Duramax LB7 LLY LBZ LMM LML engines in trucks and vans.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What material and finish does the bolt have?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e Made from ARP2000 alloy 8740 chromoly with black oxide finish for corrosion resistance and precise torque.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the warranty and torque procedure?\u003cbr\u003e\n      \u003cstrong\u003eA:\u003c\/strong\u003e ARP provides limited lifetime warranty against manufacturing defects torque to 300 ft-lbs dry or 340 ft-lbs with moly lube in three steps.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS Ground or USPS Priority\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock - ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Secure padded envelope 5 x 4 x 1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.25 lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ARP","offers":[{"title":"Default Title","offer_id":39861236465743,"sku":"ARP129-2503","price":30.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/arp-gm-duramax-6_6l-harmonic-balancer-bolt-kit-arp.jpg?v=1768369902","url":"https:\/\/www.blackopsautoworks.com\/products\/arp-gm-duramax-6-6l-harmonic-balancer-bolt-kit","provider":"Black Ops Auto Works","version":"1.0","type":"link"}