{"title":"Cummins 12-Valve 5.9L 6BT 1989 - 1998","description":"High output alternators for the 12-valve 5.9L Cummins, 1989-1998. Bolts to the factory mount with no belt change required.","products":[{"product_id":"s-series-6-phase-240-amp-alternator-for-early-cummins","title":"240 Amp High Output Alternator - 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026 24V","description":"\u003ch2\u003e240 Amp High Output Alternator for 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026amp; 24V\u003c\/h2\u003e\n\u003cp\u003eFits the 5.9L Cummins in 1989-2002 Dodge full-size trucks, covering both the 12-valve 6BT and the 24-valve ISB. This is a direct bolt-in upgrade over the factory unit — same mount, same pulley position, no bracket modification.\u003c\/p\u003e\n\u003cp\u003eDiesel engines spend most of their working life at low RPM, and that is exactly where a stock alternator runs out of headroom. This unit holds 200+ amps at engine idle and delivers a full 240+ amps at cruising speed, hot rated — enough for a lift pump, auxiliary lighting, a winch, a plow, a welder or a competition-grade stereo without watching your voltage sag at every stoplight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine codes covered:\u003c\/strong\u003e 12-valve 6BT, 24-valve ISB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicles:\u003c\/strong\u003e Dodge Ram 2500 3500\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eManufacturer specifications and full fitment\u003c\/h3\u003e\n\u003ch3\u003eS Series\u003c\/h3\u003e  \u003cp\u003eThe S series of 6 phase alternators offers incredible output in a compact and durable package. Highly efficient, these units use less horsepower than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure long service life, even in severe conditions.  These units are available for a broad range of domestic and import applications in 170, 240, or 320 amp configurations. The 240 amp model offers the best balance between peak output, and output at engine idle RPM.\u003c\/p\u003e\u003c!-- Notes Begin --\u003e\u003cdiv style=\"width:80%;border-bottom:1px dashed #CCC;height:5px;\"\u003e\u003c\/div\u003e\u003cp\u003eInstallation Notes:\u003c\/p\u003e \u003cp\u003e \u003c\/p\u003e\u003ch3\u003e\u003cem\u003eFitment Guide:\u003c\/em\u003e\u003c\/h3\u003e \u003ctable style=\"width: 95%;\" cellspacing=\"15\" cellpadding=\"3\"\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd width=\"156\"\u003e\u003cem\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/em\u003e\u003c\/td\u003e \u003ctd width=\"121\"\u003e\u003cem\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/em\u003e\u003c\/td\u003e \u003ctd width=\"121\"\u003e\u003cem\u003e\u003cstrong\u003eEngine Size\u003c\/strong\u003e\u003c\/em\u003e\u003c\/td\u003e \u003ctd width=\"86\"\u003e\u003cem\u003e\u003cstrong\u003eYear\u003c\/strong\u003e\u003c\/em\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e   \u003ctd\u003eDodge\u003c\/td\u003e   \u003ctd\u003eFull Size Truck\u003c\/td\u003e   \u003ctd\u003e5.9L Diesel Cummins\u003c\/td\u003e   \u003ctd\u003e1988 - 2002\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e ","brand":"Mechman","offers":[{"title":"Default Title","offer_id":42635017519186,"sku":"13302240","price":429.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/6696\/3282\/files\/13302240-001__27891__87995.png?v=1787236048"},{"product_id":"320-amp-s-series-alternator-for-early-5-9l-cummins","title":"320 Amp High Output Alternator - 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026 24V","description":"\u003ch2\u003e320 Amp High Output Alternator for 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026amp; 24V\u003c\/h2\u003e\n\u003cp\u003eFits the 5.9L Cummins in 1989-2002 Dodge full-size trucks, covering both the 12-valve 6BT and the 24-valve ISB. This is a direct bolt-in upgrade over the factory unit — same mount, same pulley position, no bracket modification.\u003c\/p\u003e\n\u003cp\u003eDiesel engines spend most of their working life at low RPM, and that is exactly where a stock alternator runs out of headroom. This unit holds 200+ amps at engine idle and delivers a full 320+ amps at cruising speed, hot rated — enough for a lift pump, auxiliary lighting, a winch, a plow, a welder or a competition-grade stereo without watching your voltage sag at every stoplight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine codes covered:\u003c\/strong\u003e 12-valve 6BT, 24-valve ISB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicles:\u003c\/strong\u003e Dodge Ram 2500 3500\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eManufacturer specifications and full fitment\u003c\/h3\u003e\n\u003cp\u003eThe S series of 6 phase alternators offers incredible output in a compact and durable package. Highly efficient, these units use less horsepower per Kw of power produced than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure long service life, even in severe conditions. \u003c\/p\u003e \u003cdiv\u003e\u003c\/div\u003e \u003cp\u003eInstallation Notes:\u003c\/p\u003e  \u003cp\u003e \u003c\/p\u003e\u003ch3\u003e\u003cem\u003eFitment Guide:\u003c\/em\u003e\u003c\/h3\u003e \u003ctable style=\"width: 95%;\" cellspacing=\"15\" cellpadding=\"3\"\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd width=\"156\"\u003e\u003cem\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/em\u003e\u003c\/td\u003e \u003ctd width=\"121\"\u003e\u003cem\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/em\u003e\u003c\/td\u003e \u003ctd width=\"121\"\u003e\u003cem\u003e\u003cstrong\u003eEngine Size\u003c\/strong\u003e\u003c\/em\u003e\u003c\/td\u003e \u003ctd width=\"86\"\u003e\u003cem\u003e\u003cstrong\u003eYear\u003c\/strong\u003e\u003c\/em\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e   \u003ctd\u003eDodge\u003c\/td\u003e   \u003ctd\u003eFull Size Truck\u003c\/td\u003e   \u003ctd\u003e5.9L Diesel Cummins\u003c\/td\u003e   \u003ctd\u003e1988 - 2002\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e ","brand":"Mechman","offers":[{"title":"Default Title","offer_id":42635019485266,"sku":"13302320","price":519.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/6696\/3282\/files\/13302240-001__38671__05911.png?v=1787236133"},{"product_id":"s-series-6-phase-240-amp-alternator-for-early-cummins-1-wire-turn-on","title":"240 Amp High Output Alternator - 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026 24V - 1-Wire","description":"\u003ch2\u003e240 Amp High Output Alternator for 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026amp; 24V\u003c\/h2\u003e\n\u003cp\u003eFits the 5.9L Cummins in 1989-2002 Dodge full-size trucks, covering both the 12-valve 6BT and the 24-valve ISB. This is a direct bolt-in upgrade over the factory unit — same mount, same pulley position, no bracket modification.\u003c\/p\u003e\n\u003cp\u003eDiesel engines spend most of their working life at low RPM, and that is exactly where a stock alternator runs out of headroom. This unit holds 200+ amps at engine idle and delivers a full 240+ amps at cruising speed, hot rated — enough for a lift pump, auxiliary lighting, a winch, a plow, a welder or a competition-grade stereo without watching your voltage sag at every stoplight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine-swap version.\u003c\/strong\u003e This part number uses a single ignition-switched 12V wire to turn the alternator on and off, so it works in swapped chassis where the factory external regulator is gone or unwanted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine codes covered:\u003c\/strong\u003e 12-valve 6BT, 24-valve ISB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicles:\u003c\/strong\u003e Dodge Ram 2500 3500\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eManufacturer specifications and full fitment\u003c\/h3\u003e\n\u003cp\u003e Motor swap applications ONLY.  This alternator comes with a single wire for 12v switched operation. This is perfect for moto swaps where the factory external regulator is not there or not desired. \u003c\/p\u003e \u003ch3\u003eS Series\u003c\/h3\u003e  \u003cp\u003eThe S series of 6 phase alternators offers incredible output in a compact and durable package. Highly efficient, these units use less horsepower than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure long service life, even in severe conditions.  The 240 amp model offers the best balance between peak output, and output at engine idle RPM.\u003c\/p\u003e","brand":"Mechman","offers":[{"title":"Default Title","offer_id":42635027513426,"sku":"13302240-1","price":429.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/6696\/3282\/files\/IMG_20230906_1105_05__15844__04552.jpg?v=1787236319"},{"product_id":"320-amp-s-series-alternator-for-early-5-9l-cummins-1-wire-turn-on","title":"320 Amp High Output Alternator - 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026 24V - 1-Wire","description":"\u003ch2\u003e320 Amp High Output Alternator for 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026amp; 24V\u003c\/h2\u003e\n\u003cp\u003eFits the 5.9L Cummins in 1989-2002 Dodge full-size trucks, covering both the 12-valve 6BT and the 24-valve ISB. This is a direct bolt-in upgrade over the factory unit — same mount, same pulley position, no bracket modification.\u003c\/p\u003e\n\u003cp\u003eDiesel engines spend most of their working life at low RPM, and that is exactly where a stock alternator runs out of headroom. This unit holds 200+ amps at engine idle and delivers a full 320+ amps at cruising speed, hot rated — enough for a lift pump, auxiliary lighting, a winch, a plow, a welder or a competition-grade stereo without watching your voltage sag at every stoplight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine-swap version.\u003c\/strong\u003e This part number uses a single ignition-switched 12V wire to turn the alternator on and off, so it works in swapped chassis where the factory external regulator is gone or unwanted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine codes covered:\u003c\/strong\u003e 12-valve 6BT, 24-valve ISB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicles:\u003c\/strong\u003e Dodge Ram 2500 3500\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eManufacturer specifications and full fitment\u003c\/h3\u003e\n\u003cp\u003eMotor swap applications ONLY. This alternator comes with a single wire for 12v switched operation. This is perfect for moto swaps where the factory external regulator is not there or not desired. \u003c\/p\u003e \u003cp\u003eThe S series of 6 phase alternators offers incredible output in a compact and durable package. Highly efficient, these units use less horsepower per Kw of power produced than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure long service life, even in severe conditions. \u003c\/p\u003e","brand":"Mechman","offers":[{"title":"Default Title","offer_id":42635027611730,"sku":"13302320-1","price":519.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/6696\/3282\/files\/IMG_20230906_1105_05__60952__64541.jpg?v=1787236321"},{"product_id":"370-amp-billet-elite-series-large-case-alternator-for-early-5-9l-cummins","title":"370 Amp High Output Alternator - 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026 24V - Black Billet","description":"\u003ch2\u003e370 Amp High Output Alternator for 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026amp; 24V\u003c\/h2\u003e\n\u003cp\u003eFits the 5.9L Cummins in 1989-2002 Dodge full-size trucks, covering both the 12-valve 6BT and the 24-valve ISB. This is a direct bolt-in upgrade over the factory unit — same mount, same pulley position, no bracket modification.\u003c\/p\u003e\n\u003cp\u003eDiesel engines spend most of their working life at low RPM, and that is exactly where a stock alternator runs out of headroom. This unit holds 200+ amps at engine idle and delivers a full 370+ amps at cruising speed, hot rated — enough for a lift pump, auxiliary lighting, a winch, a plow, a welder or a competition-grade stereo without watching your voltage sag at every stoplight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine codes covered:\u003c\/strong\u003e 12-valve 6BT, 24-valve ISB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicles:\u003c\/strong\u003e Dodge Ram 2500 3500\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eManufacturer specifications and full fitment\u003c\/h3\u003e\n\u003cstrong\u003e The long-awaited BILLET Large Case Cummins Mechman alternator is finally here!  After listening to our customers' needs and usage, we've developed the first and only LARGE CASE style alternator for the unbreakable 5.9 Cummins engines!    \u003cbr\u003e \u003cbr\u003e Why is a large case alternator better?  Amperage output at idle\/low RPM's, right where diesel engines like to operate the most!   With nearly 200 amps just at idle and over 370 amps at driving RPM's this alternator is the most power single alternator you can install in the factory location.  We're even able to use a near stock sized pulley so you don't even need to change your belt with the installation of this part number.  It's a win after a win after a win! \u003cbr\u003e \u003cbr\u003e This is mostly a plug and play operation and bolts in just like OEM.  We do provide a 2pin wiring harness with this alternator for OEM fitments and detailed instructions on how to install in your vehicle. If you are needing higher voltage than what the OEM vehicle produces (13.9-14.4 volts), this alternator is already set up for external voltage control via our 91102RC \"blue box\" external voltage regulator.  Again, this is NOT NEEDED in OEM applications but if you are needing higher volts you're set up for success from the start!  \u003c\/strong\u003e","brand":"Mechman","offers":[{"title":"Default Title","offer_id":42635038228562,"sku":"B13302370B","price":629.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/6696\/3282\/files\/370-amp-Billet-Elite-Series-Large-Case-alternator-for-early-59L-Cummins-by-Mechman-SSA-STORE_31663__19632.jpg?v=1787236612"},{"product_id":"370-amp-billet-elite-series-large-case-alternator-for-early-5-9l-cummins-1-wire-turn-on","title":"370 Amp High Output Alternator - 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026 24V - 1-Wire - Black Billet","description":"\u003ch2\u003e370 Amp High Output Alternator for 1989-2002 Dodge Ram 5.9L Cummins 12V \u0026amp; 24V\u003c\/h2\u003e\n\u003cp\u003eFits the 5.9L Cummins in 1989-2002 Dodge full-size trucks, covering both the 12-valve 6BT and the 24-valve ISB. This is a direct bolt-in upgrade over the factory unit — same mount, same pulley position, no bracket modification.\u003c\/p\u003e\n\u003cp\u003eDiesel engines spend most of their working life at low RPM, and that is exactly where a stock alternator runs out of headroom. This unit holds 200+ amps at engine idle and delivers a full 370+ amps at cruising speed, hot rated — enough for a lift pump, auxiliary lighting, a winch, a plow, a welder or a competition-grade stereo without watching your voltage sag at every stoplight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine-swap version.\u003c\/strong\u003e This part number uses a single ignition-switched 12V wire to turn the alternator on and off, so it works in swapped chassis where the factory external regulator is gone or unwanted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine codes covered:\u003c\/strong\u003e 12-valve 6BT, 24-valve ISB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicles:\u003c\/strong\u003e Dodge Ram 2500 3500\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eManufacturer specifications and full fitment\u003c\/h3\u003e\n\u003cstrong\u003e The long-awaited BILLET Large Case Cummins Mechman alternator is finally here!  After listening to our customers' needs and usage, we've developed the first and only LARGE CASE style alternator for the unbreakable 5.9 Cummins engines!    \u003cbr\u003e \u003cbr\u003e Why is a large case alternator better?  Amperage output at idle\/low RPM's, right where diesel engines like to operate the most!   With nearly 200 amps just at idle and over 370 amps at driving RPM's this alternator is the most power single alternator you can install in the factory location.  We're even able to use a near stock sized pulley so you don't even need to change your belt with the installation of this part number.  It's a win after a win after a win! \u003cbr\u003e \u003cbr\u003e This version of the billet part number is for the customers that have performed a Cummins swap into another vehicle.  Many times, when doing motor swaps with vehicles that use external regulators it's a pain to source or reuse the older lower voltage and let's just be honest, less reliable external boxes.  We take the guess work out of all of that and use the same GM 4pin style regulator instead of the standard build part number terminal block regulator.  This allows the alternator to be turned on and off with a simple single wire connected to a 12v key on\/off source from the vehicle.  These internally regulated options will range in voltage from 14.6 to 15 volts (temperature based as per std operation). \u003cbr\u003e \u003cbr\u003e This also opens up the options of our voltage boosting harnesses found in the harness section on the website making this an extremely useful modification for future or unique applications requiring simple, quick and easy voltage adjustment. \u003c\/strong\u003e","brand":"Mechman","offers":[{"title":"Default Title","offer_id":42635038294098,"sku":"B13302370B-1","price":629.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/6696\/3282\/files\/370-amp-Billet-Elite-Series-Large-Case-alternator-for-early-59L-Cummins-1-Wire-Turn-On-by-Mechman-SSA-STORE_31674__89634.jpg?v=1787236614"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/6696\/3282\/collections\/cat_brackets-CUMMINS.jpg?v=1787251825","url":"https:\/\/dieselalternators.com\/collections\/12-valve-cummins-alternators.oembed","provider":"Diesel Alternators","version":"1.0","type":"link"}