- HIGH OUTPUT POWER Delivers up to 400 amps of charging power with approximately 200 amps at idle, making it ideal for high-performance car audio systems and demanding electrical setups
- 6 PHASE HAIRPIN TECHNOLOGY Built with advanced 6-phase hairpin stator design for improved efficiency, durability, and consistent output under heavy load conditions.
- CUSTOM FITMENT DESIGN Designed for custom applications only. Includes universal adapter hardware to assist with installation across a wide range of brackets and setups.
- ADJUSTABLE PULLEY SETUP Equipped with a 46mm 9-rib pulley to allow fine-tuning of belt alignment, critical for custom builds where precision fitment is required.
- HIGH VOLTAGE CAPABLE Operates at 14.6V–15V (temperature based). Optional voltage boosting harnesses available separately for output up to 16+ volts.
Mechman 400 Amp High Output Alternator CS144 Cast Case Custom Fitment 7864400
This listing includes:
- (1) MechMan 400 Amp High Output Alternator
Built for serious electrical demand, this Mechman 400 amp alternator delivers massive output without sacrificing reliability. Designed for custom applications, it combines modern 6-phase hairpin technology with a more budget-friendly cast case that can be painted or customized to match your engine bay.
This unit is capable of producing up to 200 amps at idle and 400+ amps at cruising speeds, making it ideal for high-performance audio systems, competition builds, and heavy electrical loads.
The included 46mm 9-rib pulley allows for fine adjustment in custom setups, helping you achieve proper belt alignment where precision matters. A universal adapter bolt, nut, and spacer are also included to assist with installation across a wide range of bracket configurations.
For optimal performance, a strong mounting bracket, proper belt wrap, and a high-quality belt are critical to handling the increased load of this high output alternator.
A P101 harness is included and requires only a 12V key-on source for operation. For users looking to increase charging voltage beyond 14.8V, optional voltage boosting plugs are available separately and can safely raise output to 16+ volts.
Specifications:
- Output: 400 Amps Max
- Idle Output: Approx. 200 Amps
- Voltage: 14.6V–15V (temperature based)
- Case Style: Cast (paintable)
- Technology: 6-Phase Hairpin
- Pulley: 46mm 9-Rib
- Fitment: Custom Applications Only
- Harness: P101 (12V key-on required)
- Weight: 17 lbs
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.
