270 Amp High Output Alternator for 2009-UP Ford F-Series, E-Series 4.6L, 5.4L, 6.8L
270 Amp High Output Alternator for 2009-UP Ford F-Series, E-Series 4.6L, 5.4L, 6.8L
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Base Price: $639.95

Price with Selected Options: $639.95

Product Code: 11431-270XP-NF


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Cable Kit Upgrade



Alternator Description

The supplied alternator is a component of a next generation high efficiency, severe duty charging system specifically engineered for Ford 4.6L, 5.4L, and 6.8L 2009-UP. This alternator produces a maximum of 270 amps and will produce a minimum of 180 amps at idle.The alternator has a maxiumum efficiency in excess of 75 percent. The rectifier is mounted onboard the alternator and consists of 12, 50 amp press-fit diodes. The brush holder assembly and slip ring are environmentally protected and the bearrings are heavy-duty, oversized premium bearings.


This new charging system features an advanced propietary stator winding of a new design that maximizes efficiency with near 80 percent density of the winding coupled with very low coil resistance. this gives the alternator maximum low speed output, as well as a 90% reduction of magnetic pulsation with the stator windings built in cancel circuit to minimize electrical noise.

Alternator Mounting

This alternator is specifically designed to mount directly in the OEM mounting locations with no modification. All electrical connections shall be in the original locations.

Alternator Performance and Demand

The OEM alternator is rated at 110-150 amps with 70-90 amps at idle. Engine idle is 650 RPS without the A/C on and 750 RPM with the A/C running. The supplied alternator makes 180 amps at normal engine idle, and 200 amps with the A/C on at fast idle. The vehicle needs a maximum of 110-150 amps to supply existing electrical loads with all accessories on leaving little room for additional accessories. The supplied alternator will supply an addtional 90 amps of available output at low idle, and 95 amps additional at high idle, and up to 160 amps additional at highway speeds.

Alternator Durability

The supplied charging system is manufactured to the highest quality standards, and is manufactured in the USA, of USA made or sourced components and are of the highest quality. All parts are carefully chosen and used for their durability, dependability, and proven performance in the field.

Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 2 Write a review.

  0 of 0 people found the following review helpful:
5 of 5 Great Alternator July 25, 2023
Reviewer: Tyler Thomas from Lehi, UT United States  
I have a supercharged F150 running a big intercooler pump (pulling 25 amps) and a few other onboard accessories. The factory alternator could keep up until I towed in 90F+ weather. Once things got hot outside, my fans were running at max, AC blower running at max, the trailer needed amps for the brakes and battery charging, and fighting increased resistance because everything is hot, I would see the factory alternator fall on its face and  see significant voltage drop. I installed this alternator and it has no problem at all keeping up with these demands!

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  0 of 0 people found the following review helpful:
5 of 5 great output, solid April 29, 2019
Reviewer: mark chauvin from clinton, MA United States  
alternator performs well. My only issue is the harness I ordered. Too short (pos) cable to go into factory harness. Had to buy more cable to complete. Not worth the additional moneys to buy.  Enough cable to do properly was about half the price.

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