SKU: B800515 | UPC: 700424676569
Cobb 2002+ Subaru WRX / 2004+ Subaru STI/Forester XT Delrin Oil Cap
The Cobb Delrin Oil Cap is a direct replacement for factory plastic caps on EJ-series turbo Subarus. It fits 2002-2007 WRX, 2004-2021 STI, and 2004-2013 Forester XT models. This cap delivers a tight O-ring seal to prevent oil leaks while offering easy removal during changes thanks to its knurled edge.
Key Features
- Delrin Construction: High-strength acetal resin resists cracking, chemicals, and heat better than OEM plastic for long-term reliability.
- Knurled Edge Design: Textured surface provides firm grip for quick, tool-free installation and removal in tight engine bays.
- Integrated O-Ring: Precision-machined seal ensures zero leaks and maintains proper crankcase pressure under boost.
- Lightweight Build: Weighs just 1.6 oz to reduce underhood mass without sacrificing strength.
- Black Finish: Clean, low-profile look complements performance engine setups.
Product Notes
- Direct bolt-on replacement no modifications required.
- Clean with mild soap avoid abrasives to preserve finish.
Installation Notes
- Professional installation recommended.
- Twist off OEM cap counterclockwise and replace with new cap torque to 10-15 in-lbs.
- Compatible with all factory and Cobb oil fill necks on listed models.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2004-2021 | Subaru | Impreza | WRX STI |
| 2004-2013 | Subaru | Forester | XT |
Why Choose Cobb?
- Decades of Subaru engineering expertise from Accessport creators.
- Made in USA with tight tolerances for exact fit.
- Backed by limited lifetime warranty on manufacturing defects.
Frequently Asked Questions
-
Q: Will this fit my 2006 WRX or 2010 STI?
A: Yes, it fits all 2002-2007 WRX, 2004-2021 STI, and 2004-2013 Forester XT with EJ25 turbo engines. -
Q: What material is the cap made from?
A: Black Delrin (acetal), a tough engineering plastic that outperforms factory nylon in durability and heat resistance. -
Q: Is installation easy and what's the warranty?
A: Hand-tighten only, 1-minute install. Covered by Cobb's limited lifetime warranty against defects.
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: 6 x 4 x 2 inch box with protective padding
- Weight: 0.25 lbs (shipping)
COBB
COBB Tuning parts for turbocharged performance platforms are stocked at Black Ops Auto Works. Shop the Accessport ECU programmer, cold air intakes, cat back exhaust systems, and supporting hardware engineered for Subaru WRX and STI, Ford Focus ST and RS, Ford F-150 EcoBoost, Mazdaspeed3 and 6, Nissan GT-R, Porsche, BMW, and Volkswagen platforms. Every product is filterable by year, make, model, and trim so the correct part ships the first time. Black Ops Auto Works carries 372 COBB SKUs across tuning, intake, and exhaust categories. What This Brand Covers COBB Tuning built its reputation on the Accessport, one of the most widely used ECU flash tools in the aftermarket, and has expanded into intakes, exhausts, downpipes, and supporting hardware for a range of turbocharged platforms. The catalog centers on a defined group of import and Euro performance vehicles rather than a single brand family. Brand Focus COBB Tuning parts are engineered primarily for Subaru, Ford, Mazda, Nissan...
View COBB Products
Engine
Engine parts and engine bay upgrades for Dodge, Jeep, RAM, Chrysler, Chevrolet, Ford, Toyota, Nissan, Subaru, and Honda vehicles are stocked at Black Ops Auto Works. Shop oil catch cans, supercharger pulleys, thermostats, radiators, cooling parts, throttle bodies, intake manifolds, headers, ignition coils, spark plugs, sensors, gaskets, fuel pumps, valve covers, engine covers, billet cap covers, and full engine bay dress-up parts for HEMI, Hellcat, Trackhawk, Redeye, Demon, Scat Pack, RAM TRX, LS, LT, Coyote, EcoBoost, K-Series, and 2JZ builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 14,298 engine SKUs across performance, cooling, oil control, ignition, and appearance categories. What This Category Covers The Engine collection combines OEM-replacement engine service parts with performance aftermarket upgrades for supercharged, turbocharged, and naturally aspirated builds...
View Engine Products
Oil Caps
Oil Caps parts and accessories are stocked at Black Ops Auto Works. Oil caps add a functional finishing touch to the engine bay while sealing the oil fill opening against dirt and vapor loss. Shop billet aluminum oil filler caps, breather caps, vented caps and colored oil caps for Mustang, Camaro, Silverado, F150, WRX, STI, Civic, Honda K series, Subaru, Dodge, Ram, Cummins and other builds. Every product is filterable by year, make, model, trim, engine and drivetrain where applicable, so the correct part ships the first time. Black Ops Auto Works carries 64 Oil Caps SKUs across the performance and replacement parts needed for a focused build. What This Oil Caps Collection Covers The collection includes direct fit oil fill caps, breather style caps, vented caps, accessory caps and dress up components. Choices range from understated black finishes to anodized colors, engraved options and fittings that support custom catch can or breather plumbing. Core parts and configurations Th...
View Oil Caps Products
Oil Systems
Oil system parts for supercharged HEMI, LS and LT platforms, diesel trucks, and daily drivers are stocked at Black Ops Auto Works. Shop oil catch cans, air oil separators, oil filters, oil pans, oil pumps, oil pickups, dipsticks, drain plugs, and motor oils for Hellcat, Redeye, Demon, Jeep Trackhawk, Ram TRX, Corvette, Camaro, CTS-V, Mustang, F-150, and Silverado applications. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 1,432 oil system SKUs across catch cans, filtration, and service hardware. What This Category Covers Oil system parts manage crankcase ventilation, filtration, and lubrication delivery throughout the engine. This collection spans oil catch cans, oil separators, air oil separators, oil filters, oil pans, oil pumps, oil pickups, dipsticks, drain plugs, oil baffles, and motor oils for street, track, towing, and high horsepower applications. Crankcase Ventilation...
View Oil Systems Products


