SKU: B815055 | UPC: 700424676996
Cobb 08-18 Subaru WRX STI / 08-14 WRX Wrinkle Black Alternator Cover
The Cobb Wrinkle Black Alternator Cover serves as a direct OEM replacement for 2008-2018 Subaru WRX STI and 2008-2014 WRX models. Machined from 6061-T6 billet aluminum and finished in durable wrinkle black powder coat, it shields the alternator from debris while delivering a clean, factory-like engine bay appearance. This lightweight cover (0.4 lbs) installs in minutes for immediate visual and functional gains.
Key Features
- Billet Aluminum Build: Crafted from 6061-T6 aluminum for strength, heat resistance, and long-term durability in engine environments.
- Wrinkle Black Powder Coat: Textured finish resists scratches, corrosion, and fading for lasting protection and sharp aesthetics.
- Direct Bolt-On Design: Matches factory mounting points precisely, requiring no cutting, drilling, or modifications.
- Engine Bay Protection: Covers alternator fully, guarding against belts, wires, and road contaminants.
- Lightweight Construction: At 0.4 lbs, adds style without affecting vehicle balance or performance.
Product Notes
- Replaces factory plastic cover (OEM part numbers 23338AA421 or equivalent).
- Powder coat withstands engine bay temperatures up to 500°F.
- MPN 815055 pairs with Cobb valve covers and SF intake for complete engine dress-up.
Installation Notes
- Professional installation recommended.
- Remove OEM cover using two 10mm bolts no special tools needed.
- Uses factory hardware torque to 6 Nm for secure fit.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2018 | Subaru | WRX STI | All (Hatchback) |
| 2008-2014 | Subaru | Impreza WRX | Base, Premium, Limited (Sedan/Hatch) |
| 2008-2014 | Subaru | Impreza WRX STI | All (Hatchback) |
Why Choose Cobb?
- Proven Subaru specialists with 20+ years developing direct-fit parts.
- USA-made using CNC machining for exact tolerances and reliability.
- Extensively tested on real-world vehicles for seamless integration.
Frequently Asked Questions
-
Q: Does this cover fit 2015-2018 WRX STI models?
A: Yes, it bolts directly onto 2008-2018 WRX STI with EJ257 engines using stock locations. -
Q: What material and finish are used?
A: Solid 6061-T6 billet aluminum with textured wrinkle black powder coat for heat and wear resistance. -
Q: What warranty applies and is installation easy?
A: Backed by Cobb's standard warranty 10-minute install with basic hand tools, no tuning required.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective foam-lined cardboard box, 12" x 9" x 2"
- Weight: 0.4 lbs (product), 1 lb (shipping)
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