External Engine Parts

Direct fit replacement glow plug by Diamond Advantage for 01-04 GM LB7 6.6L Duramax. Meets or exceeds factory specs. Provides a perfect fit, function and performance. Warranty:Diamond Advantage offers a two-year, unlimited mileage warranty with labor coverage, so customers can enjoy peace ..

DFC engines may take up to 14 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  Built for work trucks, daily drivers and the diesel enthusiast in mind these engines are a vast improvement from stock as they contain important upgrades to common..

DFC engines may take up to 14 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  Built for work trucks, daily drivers and the diesel enthusiast in mind these engines are a vast improvement from stock as they contain important upgrades to common..

DFC engines may take up to 14 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  FEATURESOur street series of engines are DFC’s flagship product. Built for work trucks, daily drivers and the diesel enthusiast in mind these engine..

DFC engines may take up to 14 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  The DFC Diesel Tow/Haul Series engine comes standard with all the upgrades found in the Street Series model as well as several enhancements to ..

DFC engines may take up to 14 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  The DFC Diesel Tow/Haul Series engine comes standard with all the upgrades found in the Street Series model as well as several enhancements to ..

DFC engines may take up to 14 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  The DFC Long Block Crate Engine is a great option for any diesel enthusiast looking to replace the tired and damaged engine in their 2006-2007 GM 6.6L Duramax LBZ...

DFC engines may take 2-8 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  Replace the tired or blown engine in your 2006-2007 GM 6.6L Duramax LBZ with one of  the best engine replacements on the market, DFC’s remanufactured Short Bl..

DFC engines may take up to 14 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  FEATURESOur street series of engines are DFC’s flagship product. Built for work trucks, daily drivers and the diesel enthusiast in mind these engine..

DFC engines may take up to 14 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  FEATURESOur street series of engines are DFC’s flagship product. Built for work trucks, daily drivers and the diesel enthusiast in mind these engine..

Smooth out the engine in your 82-93 6.2L/6.5L Diesel with the Fluidamper Performance Series Damper. Reduces damaging torsional vibrations.Part number: 800191..

GM 6.5L Turbo Diesel Dorman Harmonic BalancerPart number: 594-170..

Replacement water pump for 6.5L Diesel by Alliant; includes gasketPart number: AP63561..

Wagler Competition Duramax Mechanical Belt TensionerDoes away with the weak factory spring belt tensionerThese are a MUST when running dual CP3 pumps on your serpentine belt setupPart Number: WCPC661025..

Fits: 2001-2004 GM 6.6L DuramaxDon't take chances with an old, questionable, or malfunctioning camshaft position sensor that can leave you stranded. These Dorman camshaft position sensors read the camshaft position and relay this information to your vehicle's ECM. This information is required for fu..

ALL NEW! Freedom Series cylinder heads for the LB7 6.6L Duramax now with a cupless injector bore - save time and money with no more injector cups to install, leak, or worry about. Each cylinder head is assembled from a new casting in our state-of-the-art Freedom Racing Engine shop and is guaranteed ..

Use our improved lower valve cover bolt kit with a hex bolt instead of the allen head bolt that is sometimes hard to get a socket or wrench on. By using our bolts, you will better be able to service your engine.Set of 12 bolts. Services one sideIncludes:LOWER VALVE COVER BOLT LB7-Each #M6C30BF10P/DP..

Replace your damaged or stripped out bolts with new replacements. Sold in packs of 11. Services one side.Includes:Upper Valve Cover Bolt, LB7, 2001-2003, Each #91290A323Part number: 10196..

This replacement HVAC heater hose assembly is engineered to match the fit and durability of the stock heater hose assembly on specified vehicles. It is designed to withstand extreme temperature changes to extend service life.Ideal replacement - this HVAC heater hose assembly directly replaces the or..

Max-Flow Race Series Manifold & Up Pipe KitFits 2001-2004 Silverado/Sierra 6.6 Duramax w/Federal EmissionsIntroducing The Max-Flow Diesel Up Pipes and Manifolds.Providing up to an incredible 55% increase in air flow over stock. These Manifolds are made tough using high quality Silica Moly Cast I..

Replace your damaged or inoperative Duramax PCV valve with this all in one service kit from DHD. As your truck ages these diaphragms swell and distort from exposure to temperature cycles and engine oil. This distortion can decrease the valves efficiency and lead to oil leaks. DHD's service kit inclu..

This is a direct-fit, bolt-on Flex-A-Lite® S-Blade dual electric-fan system for new body style 2001-2005 Chevrolet and GMC trucks with the 6.6L Duramax diesel. Dyno tests show a gain of up to 27 horsepower and 34 lbs-ft. of torque while also improving fuel economy by replacing your stock clutch fan ..

Features & Benefits:Diamond Advantage™ Water Pumps are designed and tested for optimal durability. • Quality built with new housing and 100% ALL-NEW components • Unitized seal prevents coolant leakage, leading to longer product life • OE-designed bearings are capable of withstanding high rotatio..

Problem: The original equipment oil cooler adapter relies on a metal gasket on the oil cooler that over time is prone to leaking as the cooler flexes.Fix: The Fleece Performance oil cooler adapter utilizes an integral square cut seal ring on the oil cooler mating surface in place of the le..

This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit and function of the original part.Direct replacement - this engine coolant reservoir matches the fit a..

Common add-on accessories like plows, on-board air compressors, horn kits, off-road lighting and even performance electronics can max out the capabilities of your factory charging system.Increase charging system reliability and output while alleviating the strain caused by the aftermarket upgrades o..

Increase the output of the charging system in your 2001-2007 GM 6.6L Duramax with the XDP Wrinkle Black HD High Output Alternator XD355. The Duramax engine is a known powerhouse that is easy to modify, but the charging system is often forgotten about until there is an issue.The demands of popular ad..

Fits: 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L DuramaxThis replacement engine oil dipstick is a direct replacement for a damaged or missing original equipment dipstick. Level marks are clearly distinguished and properly gauged for accuracy.Dorman 921-046..

Ditch the grit. Get rid the dirtiest oil left in the valley of your stock pan from all your previous oil changes.The stock Duramax engine oil pan is stamped steel (very poor heat dissipation) and there is a valley in the pan which prevents your old oil from being completely drained on each oil chang..

Upgrade the oil pan in your 2001-2010 GM 6.6L Duramax with the AFE 46-71070B Pro Series Deep Engine Oil Pan. The truck's stock steel pan leaves behind over 1/2 qt. of oil during an oil change, but this higher capacity AFE Oil Pan is designed to help drain more oil, so it is fresh oil in the crank ca..

Extend the life of your 2001-2010 GM 6.6L Duramax engine by ensuring every oil change is a complete one. Your truck's stock steel pan leaves behind over 1/2 qt. of oil during maintenance, but the AFE 46-71070A Street Series Deep Engine Oil Pan helps drain all of the existing oil for a full oil chang..

Fits: 2001-2010 GM 6.6L DuramaxThe block heater cord is often the culprit for a non-operative block heater. The cord and its connection are susceptible to the elements, causing internal shorts, high resistance and internal corrosion.GM 19301659..

Features & Benefits:Diamond Advantage™ (DA) Oil Pumps provide dependable performance every time. • Quality built with new housing and 100% ALL-NEW components • Robust gear and gerotor technology provides peak performance and quality • Precision ground end plates guarantee maximum wear resistanc..

Replacement clips for joining upper and lower fan shrouds.Part number: 10015..

This all in one seal kits provides all the quality OE GM gaskets and seals required to replace or reseal your rear engine cover. Also included are 2 new upper oil pan dowels as these are often distorted during service and a new tube of Mahle JV8 premium aluminum sealant.Includes:(2) Block-to-cover C..

Direct fit replacement inlet hose tee connector for 01-14 GM 6.6L Duramax Silverado/ Sierra 3500 by Dorman.Made of quality materials, this HVAC heater hose connector matches the fit and function of an original equipment connector to restore leak-free performance.Quality replacement - this heate..

Direct fit replacement inlet hose tee connector for 01-14 GM 6.6L Duramax Silverado/ Sierra 3500 by Dorman.Made of quality materials, this HVAC heater hose connector matches the fit and function of an original equipment connector to restore leak-free performance.Quality replacement - this heate..

Beginning from billet 6061 aluminum material it is custom CNC machinedThis systems features billet coolant tank, Water to air core size 18L X 10.1W, Tig welded, O-ring surfaces, Inlet to your specifications (V-band, Vanjen or hose barb)This system is Port Matched to the WCP Cylinder HeadsThis billet..

Fits: 2001-2016 GM 6.6L DuramaxReplaced your faulty element with the GM Block Heater Element. This heating element is a Genuine GM part that is a direct-fit replacement that will maintain EO fit and finish. The heating element is mounted on the passenger's side of the engine near the front of the bl..

Not all up pipe bolts are created equal! Its just about impossible to find the correct dimension M10 bolt with the correct shoulder and socket size as factory. Well, not anymore!DHD's up pipe bolts are designed to be an exact replacement for your rusty or broken OE hardware. These bolts work well on..

DHD 030-5001 Billet Rear Engine Cover Coolant Block Off PlateDHD's Billet Coolant Passage Block Plate is used to stop the problematic Duramax coolant leak where the stock cast plate is installed on the rear engine cover. Use this to fix your current coolant leak or to prevent a possible future coola..

Refreshing or resealing your engine? Replace your rusty, damaged or broken hardware with this zinc coated oil pan bolt kit from DHD. Note: This kit will allow you to convert your studs to bolts, and or use the nuts provided on your studs. Features:Perfect FitOE Grade & StrengthCorrosio..