- HIGH OUTPUT PERFORMANCE – Delivers over 180 amps at idle and 320+ amps while driving, providing substantial charging power for aftermarket electrical accessories and car audio systems.
- DIRECT FIT REPLACEMENT – Designed as a bolt-in upgrade for compatible Ram 5.7L HEMI applications with factory mounting locations and connections.
- HEAVY-DUTY CONSTRUCTION – Features advanced 6-phase hairpin stator technology and 12 press-fit diodes for durability, efficiency, and long service life.
- IMPROVED CHARGING CAPABILITY – Supports large amplifiers, lighting systems, winches, air compressors, and other high-current accessories while helping recharge batteries faster.
Mechman 320 Amp High Output Alternator for Ram 5.7L HEMI
- This listing includes: (1) Mechman 11477320 Alternator
Built for serious electrical demand, the Mechman 320 Amp High Output Alternator is the perfect upgrade for Ram trucks equipped with the 5.7L HEMI engine. Designed as a direct bolt-in replacement, this alternator delivers over 180 amps at idle and 320+ amps at cruising speeds, providing the power needed for high-performance car audio systems, off-road accessories, lighting, winches, and other demanding electrical upgrades.
Utilizing advanced 6-phase hairpin stator technology and 12 heavy-duty press-fit diodes, this alternator is engineered for exceptional efficiency, durability, and consistent output. Whether you're powering a competition audio build or simply need stronger charging performance than the factory unit can provide, this Mechman alternator delivers reliable current when you need it most.
Important Charging System Information:
This application uses a factory computer-controlled charging system. Charging voltage will continue to be regulated by the vehicle's ECU/PCM and will follow factory charging behavior. While this alternator significantly increases available amperage and charging capability, custom or fixed voltage output settings require ECU tuning.
Installation Notes:
- Direct bolt-in replacement for compatible Ram 5.7L HEMI applications
- Produces 180+ amps at idle
- Produces 320+ amps at cruising RPM
- Features smaller 1.75" pulley for improved low-speed output
- Slightly shorter serpentine belt may be required
- Not recommended for sustained engine speeds above 5,000 RPM
- Ideal for aftermarket audio systems and high electrical loads
Features:
- 320 Amp Maximum Output
- Over 180 Amps at Idle
- Advanced 6-Phase Hairpin Technology
- Heavy-Duty 12 Press-Fit Diode Design
- Direct Factory Replacement
- Improved Battery Charging Performance
- Designed and Built for High Electrical Demand Applications
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
Bank Transfers
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.
