2013-2021 Subaru WRX STI 2.5L 250amp High Output Alternator

2013-2021 Subaru WRX STI 2.5L 250amp High Output Alternator

Upgrade your 2013-2021 Subaru WRX STI 2.5L 250amp with a high-output alternator from JS Alternators. This direct-fit alternator drops into your stock alternator location with no modifications required.

Key Features

• Direct Fit — Drops into your factory alternator location
• Smaller Pulley Included — Spins faster for maximum output
• High-Output Performance — Built for car audio, marine, racing, and high-demand electrical systems

Fitment

• 2013-2021 Subaru WRX STI 2.5L 250amp
• Direct replacement — bolts into the stock alternator location

Notes

• A smaller pulley is included — install a 1/2" to 1" shorter belt for proper fit
• If you require a specific voltage setpoint, purchase a compatible voltage regulator separately
• A Big 3 Wiring Upgrade Kit is required when installing any high-output alternator — 1/0 gauge 100% copper wire is recommended

Pro Tip: Pair this alternator with a Big 3 Wiring Upgrade Kit to ensure your electrical system can handle the increased output safely and efficiently.