Ignitions and Electrical› Charging Systems

XS Power

CONTROLLER AND HARNESS FOR GM SI SERIES ALTERNATORS (1969 TO 1988) BLUE DISPLAY

$214.99

SKU: X008 XSP320-311

In Stock
In Stock
Ships by Jun 10
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The XS Power XSP320-311 is a dash-mounted digital voltage controller designed for GM "SI" Series alternators from 1969 to 1988. It features a blue LED readout and includes a custom wiring harness. This controller is compatible with 12, 14, or 16-volt systems and can be used with both stock and aftermarket alternators. It allows for on-demand adjustment of alternator voltage, with charge capabilities up to 15.2 volts for 12-volt systems and up to 19.5 volts for 14 or 16-volt settings.

Fitment

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Specifications

BrandXS Power
Part NumberX008 XSP320-311

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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