High Output Alternator for Subaru Impreza (1997-1998) 2.2L

High-Output 150-Amp Alternator for 1997-1998 Subaru Impreza (GC/GF)

What it Does: The 150-amp high-output alternator replaces the low-output factory charging unit on the 1997-1998 Impreza to eliminate voltage drops and supply continuous, stable current to high-draw electrical systems.

The Stock Subaru Impreza Low-Amperage Limitation

The factory charging system on the EJ22-powered Impreza delivers a modest 60 to 75 amps. After decades of thermal cycling, original diodes degrade, internal rotor resistance increases, and charging current plummets at idle. When builders add aftermarket audio amplifiers, electric cooling fans, auxiliary driving lamps, or off-road gear, system voltage dips below 12.6V. This causes dimming headlamps, lazy ignition coil saturation, and chronic battery drain.

The Engineering Solution

Engineered for the first-generation GC/GF chassis, this heavy-duty unit increases charging capability to 150 amps. Built around premium stator windings, a heavy-duty bridge rectifier, and heat-resistant avalanche diodes, it mitigates heat soak and withstands demanding duty cycles. Each alternator is bench-tested before dispatch and uses factory-spec mounting lugs and the original harness connector, allowing a clean bolt-in installation with precise belt alignment matching OEM references 23700-AA290 and A2TA7691.

What's Included

• 1x 150-Amp High Output Alternator

Technical Specifications

Compatibility

• 1997 Subaru Impreza Base 2.2L H4
• 1997 Subaru Impreza L 2.2L H4
• 1997 Subaru Impreza Outback Sport 2.2L H4
• 1998 Subaru Impreza L 2.2L H4
• 1998 Subaru Impreza Outback Sport 2.2L H4

Frequently Asked Questions & Fitment Warnings

Does this fit the GC/GF Impreza?

Yes, this is a direct fit for the 1997-1998 Subaru Impreza equipped with the EJ22 2.2L engine. Does not fit 1.8L or DOHC 2.5L RS models without verifying plug configuration and bracket clearance.

Do I need to upgrade my charging wiring?

Upgrading the primary alternator output wire and chassis grounds to 4-gauge wire is recommended when utilizing high continuous amperage to ensure total circuit efficiency and protect stock wiring.

The Subaru Performance Standard

Built to handle the demands of modified boxer engines, this high-output alternator delivers continuous electrical stability, ensuring robust spark energy and component reliability across the entire powerband.