370-Amp Billet High Output Alternator for Dodge Ram HEMI Direct Fit Mechman

• Direct OEM Replacement – Bolt-in fit for Ram pickup trucks with HEMI engines; no custom brackets or modifications needed.
• Massive Output – Delivers 200+ amps at idle and 370+ amps at cruising speed to power high-demand electrical systems.
• Advanced 6-Phase Technology – Features hairpin stator and 12 press-fit diodes for superior efficiency and long-term durability.
• CNC-Machined Billet Housing – Precision-built for strength, heat dissipation, and a premium finish.
• Installation Note – Includes smaller 1.75” pulley; a slightly shorter drive belt is required (not recommended for sustained use above 5,000 RPM).

370-Amp Billet High Output Alternator for Dodge Ram HEMI Direct Fit Mechman

This listing includes:

• (1) 370-Amp Billet High Output Alternator for Dodge Ram HEMI Direct Fit Upgrade

Maximize Your Power — 370-Amp E Series High Output Alternator for Ram HEMI

Upgrade your Ram pickup’s electrical system with confidence. The 370-Amp E Series alternator is a direct bolt-in replacement for OEM alternators on Ram trucks with HEMI engines, delivering serious power where it counts. Expect over 200+ amps at engine idle and a massive 370+ amps at cruising speed, giving you the performance you need for demanding electrical setups like aftermarket audio systems, lighting, and accessories.

Built for durability, this alternator features advanced 6-phase hairpin technology and 12 heavy-duty press-fit diodes, ensuring reliable output under tough conditions.

Key Features

• Direct bolt-in replacement for Ram HEMI OEM alternators


• 200+ amps at idle / 370+ amps at cruising speed


• 6-phase hairpin stator for efficient, high-output performance


• 12 press-fit diodes for maximum durability


• CNC-machined billet housing for strength and style


• Includes smaller 1.75" alternator pulley

Important Notes

• A slightly shorter drive belt than stock is required due to the smaller pulley


• Not recommended for sustained engine speeds over 5,000 RPM

Whether you're powering a custom audio system or additional electrical accessories, this alternator is designed to keep up — and keep you moving.

Accepted Payment Methods at Big Jeff Audio

At Big Jeff Audio, we strive to make your shopping experience as smooth as possible by offering a wide variety of payment options. Below is a complete list of the payment methods we accept:

Credit and Debit Cards

• Visa
• Mastercard
• American Express
• Discover
• Diners Club

Digital Wallets

• Amazon Pay
• Apple Pay
• Meta Pay (formerly Facebook Pay)
• Google Pay
• Shop Pay
• PayPal

International Payment Methods

• Bancontact
• iDEAL

Bank Transfers

• Zelle

Financing Options

We also offer financing options to make purchasing easier. Learn more about our financing options here.

• Klarna
• Affirm
• Sezzle
• Snap
• Acima
• Tiptop

If you have any questions or need assistance with payments, feel free to reach out to us at info@bigjeffaudio.com or call us at 737-BIG-JEFF.

Shipping Options and Delivery Time

Do You Offer Expedited Shipping?

Yes! At checkout, you can select from different shipping options:

• Standard Shipping: Free for orders over $100.
• Expedited Shipping: Available at an additional cost, calculated based on the weight and destination of your order.

How Long Does Delivery Take?

• Handling Time: Most orders are processed and shipped within 1 business day after receiving cleared payment. Occasionally, additional handling time may be required, but we’ll notify you if that’s the case.
• Standard Shipping: Typically takes 3-5 business days, though delivery may be affected by extreme weather or holidays.

What Happens If My Package Is Undeliverable?

If your package is refused or marked undeliverable and returned to us by the carrier, you’ll need to pay the full shipping cost to have the package resent. Alternatively, we can refund your order, minus the cost of shipping.

Why Can’t I Track My Order?

If you're having trouble tracking your order:

• Make sure you’ve received the shipping confirmation email with the tracking number.
• Log into your account on our website and use the “Check Your Order Status” button.
• If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.