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Are there versions that eat up more horsepower than others? In most cases, the answer to all of these questions is, "yes!" Have you ever sat in traffic, idling, headlights on, cooling fans on and discover the amp gauge discharging or the signal lights very sluggish? That's Boost your car audio system with the 10 best alternators of 2025—discover which models deliver unmatched power and performance and why they matter. These HUMMER PARTS GUY HPG SUPPLIES AM GENERAL OEM HMMWV HUMMER H1 GENUINE HUMVEE PARTS LIKE 57K4388 / 01-509-4688 - 2920-01-509-4688 | KIT, 400 AMP ALTERNATOR [196901 AND ABOVE] This is a direct fit high-output alternator for the 2003-2007 Ford F-350 Super Duty 6. Shop now! 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Since you're already familiar with D4S and running a JP amp (I am buddies with Jacob Scott over there), I would actually suggest the JP40. 2L 6 cylinder B8498400B, best prices, fast ship time & top notch customer service! @ Mechman Alternators The Elite series 400 amp alternator offers great amperage output and durability at a great price. Shop now! Model Trim Engine Add vehicle HMMWV 400 AMP Alternator Complete Conversion Kit Without Alternator [I18FL] Brand New $255. Grd. or Pos. Then it started making a loud noise and I tried to fix it and broke it. I have a voltmeter in my dashboard and look at it all of the time to look for voltage drop. Being a direct fit, this alternator fits directly into your stock alternator location. 7612N (205021) Leece-Neville Type 2700JB Series 130 Amp/12 Volt Alternator - Neg. 3L 5. Shop now! Delco type CS130 and CS130D Series Alternators. MECHMAN 400 Amp Black Billet High Output Alternator for GM Truck / SUV with OEM STRETCH BELT - B11785400B This unit comes equipped with a smaller 1. If you DO NOT use the This is a direct fit high-output alternator for the 2011-2022 Ford F-350 Super Duty 6. Enjoy 200+ amps at idle and over 400 amps at driving rpms from a simple alternator swap. 400 Amp Large Case cast alternator for C5 / C6 Corvette *** NOT FOR RACING USE *** The Elite series large cast case 400-amp alternator offers great amperage output. Upgrade your 2000-2006 Dodge Durango 4. One wire alternators Self Exciting or “one wire” alternators will have no plug on the alternator whatsoever, and the OEM alternator harness plug will be left disconnected. 2L. Upgrade your 2015-2022 Ram ProMaster City 2. 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Shop now! Nov 2, 2025 · NEW GM ALTERNATOR 400 AMP. Y. This is a direct fit high-output alternator for the 2011-2020 Ford F-150 3. This high-output alternator comes with a 14. The Highest Quality with the Lowest Prices. 0L 250-320-370-400 amp High Output Alternator. 00 Get it by Thursday, July 24 Add to Cart Apr 30, 2018 · The Prestolite IdlePro Extreme 12V 400-Amp Heavy Duty Alternator is optimized for fire truck applications to deliver improved output at low engine speeds. So I hit up singer alternators and he said I only Mechman 400 Amp High Output Alternator 1996-2004 GM Truck 4. Upgrade your 1991-1995 GMC K1500 5. Find top brands, exclusive offers, and unbeatable prices on eBay. Our aim was to deliver maximum power from the smallest, […] The Elite series 400 amp alternator offers great amperage output and durability at a great price. 8L 5. 75-inch diameter alternator pulley but will NOT require a shorter belt! Not recommended for sustained use above 5,000 RPM engine speed (racing). com. But what sets them apart, and which one will give you the performance boost you need? The Elite series large cast case 400-amp alternator offers great amperage output. Engineered to deliver exceptional amperage output and reliability, the Elite Series 400 Amp Alternator exceeds 400 amps at cruising speeds and produces over 200 amps at engine idle (HOT RATED). 0/7. The Billet Elite series 250-amp alternator offers great amperage output and durability at a great price. Ready to replace your car alternator? Don’t delay! Visit VPW for a huge selection of reliable automotive alternators, all at competitive prices. 0L engines 6 phase technology with twin rectifier assemblies and 12 diodes for durability and high amperage output Requires a slightly shorter drive belt for proper tension; not recommended for sustained use above 5,000 RPM May need additional adapter harness for vehicles originally equipped with CS144 Heavy duty After trying 3 different companies that CLAIMED to make a 400 and 410 amp alternator they never did any better than my Mechman 250 did. BNR parts experts in Alternators and Starters since 1957. Add a good battery or battery bank and it will make all the power you need. The Elite series 400 amp alternator offers great amperage output and durability at a great price. I do have an extra battery as well XS power not quite sure on the size. These impressive alternators produce 190+ amps at engine idle RPM and 400+ amps at This is a direct fit high-output alternator for the 2005-2007 Chevrolet Corvette 6. 400 Amp High Output Alternator for 1996 - 2004 GM Truck 4. Shop Mechman 400 Amp High Output Alternator 05-13 GM Truck 8302400, best prices, fast ship time & top notch customer service! @ Mechman Alternators Explore a wide range of our 400A Alternator selection. This is a direct fit high-output alternator for the 1997-2003 Ford F-150 4. 8v and one would be all you need if you're gonna run a 400 amp alternator. 6 phase technology, combined with massive twin rectifier assemblies and 12 huge diodes make these alternators totally durable for daily use. 3L, 5. Billet Elite Series 400-amp T-Mount High Output Alternators The wait is over and your requests for a billet alternator for Ford applications is here! Using our same tried and true internals from our other 400 offerings like 6 phase technology, Upgrade your 2017-2021 Nissan Armada 5. 7L 6L Brand New $699. E Series 400 amp Black Billet GM truck 05-13 *** BSTOCK *** *Attention!* This is a B-Stock, Display or Show ProductMechman B-Stock alternators are factory-refurbished units that may have been lightly used, returned, or reconditioned. 96-Series (48V) Alternators Mid-Duty Cycle, Large Frame Alternators 60A (2. 1 that called for a 400 amp fuse, and I had the same question. Jul 11, 2017 · I have done considerably research across supplies (batteries, alternator, inverters), upfitters, battery manufacturers, etc and I remain frustrated at getting a good answer. Amazing output at low idle this gold standard Pure Power alternator will keep up with all your vehicle power demands. Featuring 6-phase technology and dual rectifier assemblies with 12 robust diodes, this alternator is designed for daily use and high performance. Put my stock alternator back in, almost no difference. Upgrade your 1996-1997 Lincoln Town Car 4. 00 Buy It Now This is a direct fit high-output alternator for the 2014-2023 Ram 1500 3. There's about 5k watts rms of car audio with 2 amps 1 is sundown SIA 3500D and DS18 EXL-P1200X4. Sep 14, 2023 · The Elite series 400 amp alternator offers great amperage output and durability at a great price. Big 3 Wiring Upgrade Kits - Upgrade your vehicle's electrical system with our easy-to-install wiring kits. This is the same alternator we use in our OEM applications but due to the popularity of engine swaps being performed, we fitted this American Power Systems, Inc. OEM Bearings , 12-80 Amp Press Fit Avalanche Diodes Sep 14, 2023 · The Elite series 400 amp alternator offers great amperage output and durability at a great price. 8 Volt GM Style Internal Regulator with one wire connection. Durable & performance-tested. Self Exciting. 0L $549. These alternators produce 200+ at engine idle RPM and 400+ amps at cruising speeds HOT RATED. Shop now! Shop Mechman 400 Amp GREEN Billet Alternator for 14-18 GM Truck B14019400GN, best prices, fast ship time & top notch customer service! @ Mechman Alternators This is a direct fit high-output alternator for the 2011-2023 Ram 3500 6. 75 inch diameter alternator pulley, and will require a slightly shorter drive belt for proper belt tension. The high-performance brushless design helps reduce weight and size, and the Isolated Ground Technology helps reduce stray voltage and electrical noise, assisting to protect the engine. 7L, 6. 9kW) and 100A (4. 6L Diesel 11348400, best prices, fast ship time & top notch customer service! @ Mechman Alternators 2008-2013 @ Mechman AlternatorsThe Elite series large cast case 400-amp alternator offers great amperage output. C-Type is now one of the simplest alternators to assemble, integrate, configure and maintain with OEM equipment. Jul 15, 2011 · DC Power Engineering's 390 Amp XP Series high output alternator is the ultimate upgrade for Chrysler and Dodge vehicles. Like most high output alternators, this unit comes with a smaller diameter pulley, and will require a 1/2 inch to one inch shorter than stock length belt for proper belt tension in most 400 Amp Black Billet Alternator for 14-18 GM Truck- *** BSTOCK *** *Attention!* This is a B-Stock, Display or Show ProductMechman B-Stock alternators are factory-refurbished units that may have been lightly used, returned, or reconditioned. For those who want HIGH AMP POWER from their Alternator, Upgrade your 2003-2009 Chevy Trailblazer Alternator with a JS high-output alternator. ( (Check instructions section for finding belt sizes and wiring)). I. 2L SOHC Installation Notes: This unit comes equipped with a smaller 1. Ensure reliable power for all electronic components, even under heavy load. Jun 6, 2007 · Shop Mechman 400 Amp Alternator for 2001-2007 6. Like most high output alternators, this unit comes with a smaller diameter pulley, and will require a 1/2 inch to one inch shorter than stock length belt for proper belt tension in most Review CE NIEHOFF 28v Duel Voltage Generator 28 Volt Alternator Lmtv fits 400 The CE Niehoff 40014V 28V Duel Voltage Generator is a robust and reliable power source, ideal for heavy-duty applications. The 400 amp Pure Power alternator is an excellent step up with twice the charging power than your original alternator. 5L. Auto Restoration This is a direct fit high-output alternator for the 1993-1996 Cadillac Fleetwood 5. High output 400 amp alternator for 14-18 GM Silverado Sierra Suburban TInstallation Notes: This unit comes equipped with a smaller 1. Built with trusted internals featuring 6-phase technology, hairpin stators, and robust 12 diode rectifiers, this alternator ensures durability and reliability. This is a direct fit high-output alternator for the 2006-2022 Chevrolet Silverado 1500 5. I was going to run an incriminator audio ia30. 6L Duramax with the Mechman billet 400 am high out put alternator Available in many colors! Get the best deals for 400A Alternator at eBay. These impressive alternators produce 200+ at engine idle RPM and 400+ amps at cruising speeds HOT RATED. This type of alternator requires only the positive and negative battery cables to be connected to the alternator to function. Sep 8, 2023 · The Elite Series 400 Amp Alternator is engineered to deliver exceptional amperage output and reliability. We can custom build a high output alternator for almost any vehicle from 170 amp to 420 amp. 0L 250-320-370-400amp High Output Alternator | JS Alternators with a JS high-output alternator. It's a stout lithium battery that will charge fine at 14. I have an XS Power 6500 under the . Oct 15, 2025 · Mechman E-Series 400 Amp Yellow Alternator For 96 - 04 GM Truck 8206400-YELL $549. 3L 4. Used on Chevy and GM Vehicles from 1986 to 2004. Shop now! We would like to show you a description here but the site won’t allow us. 9L 250-320-370-400amp High Output Alternator | JS Alternators with a JS high-output alternator. Being a direct fit, aftermarket alternator replacement fits directly into your stock alternator location. 240 amp alternator for Coyote 5. Upgrade your 1999-2006 Volkswagen Jetta 1. 6 phase technology combined with massive twin rectifier assemblies and 12 diodes makes these alternators totally durable for daily use, while still maintaining 200+ amps at engine idle speeds. Sep 27, 2023 · The Elite series offers the highest possible amperage and durability available in a large case alternator. Shop now! Upgrade your 2002-2004 Ford F-250 Super Duty 5. Open issues: 1) Can the built-in Sprinter alternator Upgrade your 2004-2008 Ford F-150 4. I am likely to go with the Lithionics 400 amp or 600 amp battery. As modern vehicles become more electrically intensive—featuring high-wattage audio setups, LED lighting systems, cooling fans, winches, compressors, and even in-car entertainment—the need for May 6, 2022 · I believe you want to use wire that has an amp rating higher than the amps rated on the alternator right? So I believe I need 3/0 wire, but I cant find anything offered for a side post battery big 3 kit. 75-inch diameter alternator pulley and will require a LONGER (Dayco 5060775 ) drive belt for proper belt tension. I also installed a 400a mechman alternator Jun 5, 2024 · From the Chrome High Output 200 Amp Alternator for Chevy to the Mechman Alternators 400 Amp RED Billet, each option boasts impressive specs and features. Mechman Alternators 400 Amp Billet Elite Series $699. 48-volt alternators are commonly used in a variety of applications where a higher voltage output is beneficial, such as in boats and recreational vehicles, renewable energy setups, industrial equipment, power generators etc. This is the same alternator we use in our OEM applications but due to the popularity of engine swaps being performed, we fitted this Mar 27, 2015 · In conjunction with the alternator experts at Powermaster and MSD, we’ve compiled the five things you need to know before upgrading to a high-amp, or high-output alternator. Shop now. Upgrade your 2005-2008 Ford Crown Victoria 4. Shop now! Shop Mechman 400 Amp Alternator for GM 4. 2 6 cylinder B8497400B, best prices, fast ship time & top notch customer service! @ Mechman Alternators May 27, 2025 · Find CHEVROLET MechMan Alternators and Generators 400 amps Advertised Amperage Output and get Free Shipping on Orders Over $109 at Summit Racing! Types of 400-Amp Alternators A 400-amp alternator is a high-capacity electrical component designed to meet the power demands of vehicles equipped with advanced electronics and performance systems. They may show minor cosmetic imperfections like scratches or finish Sep 14, 2023 · The Elite series 400 amp alternator offers great amperage output and durability at a great price. The ECO40 C-Type range has many product features designed into the alternator. Shop Mechman 400 Amp Alternator for GM 4. This high-output alternator comes with a factory style plug so that your OEM plug will plug directly into the alternator. heavy duty high output alternator 55i-400act-28p: 24V 400 amp alternator. 8L. 0 new watchers per day, 2 days for sale on eBay. 7L PicClick Exclusive Popularity - 2 watchers, 1. This high-output alternator comes with a separate adaptor plug. 00 Free shipping Easy voltage boosting harnesses for Mechman GM alternators 400 Amp Mechman Alternator & Big 3 Upgrade On The Tahoe 💪 One Wire Alternator Conversion and Installation - D. Shop now for fast shipping and easy returns! This Elite series 400-amp alternator offers great amperage output, durability and is completely durable for daily use. Shop now! Sep 26, 2024 · So i was told to get a 400 amp alternator for my 2012 Nissan altima 3. Shop mechman-bstock 400 Amp High Output Alternator 05-13 GM Truck *** BSTOCK *** 8302400-BSTOCK, best prices, fast ship time & top notch customer service! @ Mechman Alternators The Elite series 400 amp alternator offers great amperage output and durability at a great price. Experience the power and reliability of a top-quality electrical system with high output alternators for your Volkswagen from JS Alternators. If you don't find your vehicle on our website, Give us a Call at 800-345-4952 or Email us your vehicle information and we can quote you direct. Upgrade your 1987-1995 Chevy Tahoe Alternator with a JS high-output alternator. Upgrade your 2010-2020 Ford Mustang Alternators with a JS high-output alternator. Its efficiency rating is best-in-class. Choose from a range of options to find the perfect fit for your Volkswagen model. 6L. Dude at incriminator told someone, that then told me, if you're running a fused distro block, then 2 200 amp fuses, if your running into a non fused block, then you'd have to use a 400. o 400 amps of alternator output. Oct 5, 2020 · I'll start with the amp. Ignoring efficiency, if you had a 400 amp alternator, you could play a constant 400 amps worth of power without your batteries discharging, although this is pretty hard on the alternator too. Therefore, with an OEM style regulator, it will have a factory voltage set point. PicClick Insights - Alt Wizard 400 Amp RVC Bypass Alternator 2005-2020 GM Truck 4. 400 amp Elite alternator for GM 2. This is a direct fit high-output alternator for the 2014-2021 Ram ProMaster 3500 3. Toyota Land Cruiser 300 Series Gasoline Triple Alternator kits Complete triple kits that add 24-volt alternators to the factory alternator with all the needed hardware and detailed installation instructions; three options to choose from: 24-Volt / 300 Amp 24-Volt / 350 Amp 24-Volt / 400 Amp HUMMER PARTS GUY HPG SUPPLIES AM GENERAL OEM HMMWV HUMMER H1 GENUINE HUMVEE PARTS LIKE 57K0273 / 01-465-1096 - 2920-01-465-1096 | KIT, 400 AMP ALTERNATOR [196900 AND BELOW] Feb 13, 2023 · I know I need to upgrade my alternator, one of the big three But my question is not can this alternator power my system, I was wondering if there is a guideline of how many amps an alternator produces to wattage an amp puts out before the alternator can't keep up anymore, say (for example Upgrade your 2001 Ford Mustang GT 4. 00 Free shipping Mechman 400 Amp High Output Alternator 05-13 GM Truck 4. As a global leader in high-tech, high-quality rotating electric products, Prestolite Electric carefully engineers and extensively tests its alternators to maximize performance in even the harshest use scenarios and extend service life, helping to Upgrade your 2007-2009 Chevrolet Trailblazer 6. One side will plug directly into the aftermarket high-output alternator, and the other side will plug into the factory plug. The Prestolite and Leece-Neville product line includes high-output, high-performance alternators for virtually every vehicle and equipment class. Shop now! Upgrade to the A4000-24V high-output alternator—ideal for marine & RV use! Quickly charges large battery banks while ensuring optimal performance. These impressive alternators produce 190+ amps at engine idle RPM and 400+ amps at This is a direct fit high-output alternator for the 2022-2023 Ram ProMaster 2500 3. This alternator is not plug-and-play and must be wired with the one wire connection. Shop now! This is a direct fit high-output alternator for the 2005-2014 Chevrolet Suburban 1500 5. 8L, 5. This is a direct fit high-output alternator aftermarket replacement for 2015-2018 BMW X4 2. We have a great online selection at the lowest prices with Fast & Free shipping on many items! 240 amp alternator for Coyote 5. In this video I show how I upgraded my ground wire to motor and body along with alternator to battery wire. They may show minor cosmetic imperfections like scratches or finish Shop mechman-bstock 400 Amp Alternator for 14-18 GM Truck *** BSTOCK *** 14019400-BSTOCK, best prices, fast ship time & top notch customer service! @ Mechman Alternators This alternator is setup using the exact same internals as our signature GM Billet 400-amp alternators that have led the categories in performance, looks and reliability. 5 V6. This is a direct fit high-output alternator for the 2012-2023 Jeep Wrangler 3. 3L - 6. All that happened was I burned up belts and even broke one with the supposed 400's I had. 0L Installation Notes: This unit comes equipped with a smaller 1. 400 Amp and 500 Amp High Output Alternators We offer More Vehicle applications and Amperage Options (in a Denso Hairpin Design) than any other company. , wo/ pulley Used On Marine, Dodge Truck, Ford Truck, Freightliner, International, Peterbilt, Volvo Truck, Western Star Replaces Cummins 216040, 3604234RX The 40SI™ is a durable brushless model available in output ranging from 240 to 320 Amps. 7L cs144 250-320-370-400amp High Output Alternator | JS Alternators with a JS high-output alternator. 3L, 4. Nov 15, 2023 · This Elite series 400-amp alternator offers great amperage output, durability and is completely durable for daily use. Mar 18, 2016 · These high amp 24v alternators are mainly for communication trucks with huge amperage draw for radios and contact trucks that need to jump-start big trucks or maybe aircraft. This is a direct fit high-output alternator for the 2013-2023 Ram 2500 6. The voltmeter is hooked up to my biggest amp, a taramps smart 3. The Elite series offers the highest possible amperage and durability available in a large case alternator. If there are batteries in the rear of the vehicle, you can run a single 1/0 gauge cable from the alternator to the closest under-hood battery terminal, and then run multiple runs of cable from the front batte Apr 22, 2022 · This article will discuss all you need to know to charge your lithium battery with an alternator effectively. Shop now! Upgrade your energy output and underhood style on your 2001-2007 6. 7L 6.