- HIGH-OUTPUT 400 AMP ALTERNATOR: Mechman machined billet alternator engineered to support demanding electrical systems, including high-powered car audio, auxiliary lighting, winches, and aftermarket accessories.
- BUILT FOR HEAVY ELECTRICAL LOADS: Delivers strong charging performance at idle and improved voltage stability under load to help keep your upgraded electrical system supported.
- MACHINED BILLET HOUSING: Premium machined billet aluminum construction provides a clean custom appearance with heavy-duty internal components designed for high-current use.
- VEHICLE-SPECIFIC DIRECT-FIT DESIGN: Designed for select Nissan, Infiniti, and Suzuki applications with 2.5L, 3.5L, 3.7L, 4.0L, and 5.6L engines. Verify vehicle fitment, alternator mounting, and regulator plug before purchase.
- IMPORTANT INSTALLATION NOTES: Uses a 1.75-inch diameter pulley and may require a slightly shorter drive belt. Not recommended for sustained operation above 5,000 engine RPM. Professional installation is recommended.
Mechman 400 Amp Machined Billet Alternator for Nissan & Infiniti 2.5L–5.6L | B11256400M
This Listing Includes
- (1) Mechman Alternator B11256400M
Built for Nissan and Infiniti applications that need serious electrical support, the Mechman 400 Amp Machined Billet Alternator delivers dependable high-output charging for demanding builds. It is an ideal upgrade for high-powered car audio systems, auxiliary lighting, winches, aftermarket electronics, and other accessories that place a heavy load on the factory charging system.
Each unit is built in the USA using premium components and engineered for strong output at idle with stable charging performance across the RPM range. The machined billet housing delivers a clean, high-end look while the heavy-duty internal design is made for consistent high-current operation.
Features
- Up to 400 amps of peak output
- Machined billet aluminum housing
- Strong idle output to support demanding electrical systems
- Designed for improved voltage stability under heavy load
- Heavy-duty internal components for high-current applications
- Direct-fit, vehicle-specific mounting configuration
- Built in the USA
- Ideal for upgraded audio systems, lighting, winches, and auxiliary power accessories
Important Fitment & Installation Notes
- Please verify your vehicle’s factory alternator, mounting configuration, and regulator plug before ordering.
- This alternator uses a 1.75-inch diameter pulley and may require a slightly shorter drive belt.
- Not recommended for sustained operation above 5,000 engine RPM.
- If your application requires a larger pulley or a different configuration, please contact us before ordering.
- For 2007 Nissan Titan applications, Nissan used more than one alternator/regulator plug configuration during the model year. Compare your factory regulator plug to the product photos before ordering.
- Professional installation is recommended. Big Jeff Audio is not responsible for damage caused by incorrect fitment, wiring, belt selection, or installation.
Mechman Confirmed Vehicle Fitment:
Infiniti
- EX35: 2008–2012 — 3.5L V6
- FX35: 2009–2012 — 3.5L V6
- FX37: 2013 — 3.7L V6
- G25: 2011–2012 — 2.5L V6
- G35: 2007–2008 — 3.5L V6
- G37: 2008–2013 — 3.7L V6
- M35: 2006–2010 — 3.5L V6
- M37: 2011–2013 — 3.7L V6
- Q40: 2015 — 3.7L V6
- Q50: 2014–2015 — 3.7L V6
- Q70: 2014–2019 — 3.7L V6
- Q70L: 2015–2019 — 3.7L V6
- QX50: 2014–2017 — 3.7L V6
Nissan
- 350Z: 2007–2009 — 3.5L V6
- 370Z: 2009–2020 — 3.7L V6
- Armada: 2007–2015 and 2017–2021 — 5.6L V8
- Frontier: 2005–2019 — 4.0L V6
- NV1500: 2014–2017 — 4.0L V6
- NV2500: 2012–2021 — 4.0L / 5.6L
- NV3500: 2012–2021 — 5.6L V8
- Pathfinder: 2005–2012 — 4.0L V6
- Pathfinder: 2013–2018 — 3.5L V6
- Titan: 2007–2015 and 2017–2019 — 5.6L V8
- Titan XD: 2016–2019 — 5.6L V8
- Xterra: 2005–2015 — 4.0L V6
Suzuki
- Equator: 2009–2012 — 4.0L V6
Important: Confirm your factory alternator, mounting configuration, and regulator plug before ordering. 2007 Nissan Titan models may use different regulator plug configurations.
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
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Digital Wallets
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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.
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- If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.
