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SKU: 826-124-101
Weapon R 02-05 WRX & 04-05 STI Hybrid Coolant & Washer Tank
The Weapon R Hybrid Coolant & Washer Tank combines coolant overflow and windshield washer reservoirs into one aluminum unit for 2002-2005 Subaru Impreza WRX and 2004-2005 Impreza WRX STI, with confirmed fit on 2006-2007 WRX models. This direct replacement reduces engine bay clutter and cuts weight by up to 1 lb compared to stock plastic tanks. It withstands high-heat conditions through corrosion-resistant construction while offering expanded fluid capacities for track days and daily driving.
Key Features
- Hybrid Reservoir Design: Merges coolant overflow and washer functions to free hood space and reduce vehicle weight by up to 1 lb over OEM tanks
- Billet Aluminum Construction: CNC-machined from 6061-T6 aluminum with black anodized finish for heat dissipation, aesthetics, and enduring strength
- Increased Fluid Capacity: Provides 1.2L washer fluid and 0.75L coolant overflow to double washer volume versus stock and minimize refills
- Direct Bolt-On Fit: Aligns with factory mounting points for installation in under 30 minutes without modifications
- Complete Kit Contents: Tank, billet cap, OEM-style fittings, stainless hardware, and pre-routed hose adapters for seamless setup
Product Notes
- Clear sight glass on washer side for instant fluid level monitoring
- Pressure-tested to 20 PSI to ensure no leaks under boosted conditions
- Packaged with foam inserts to arrive undamaged
Installation Notes
- Professional installation recommended.
- Drain fluids first and transfer OEM hoses to included barbed fittings
- Uses factory mounting brackets and hardware for secure installation
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2005 | Subaru | Impreza | WRX |
| 2004-2005 | Subaru | Impreza | WRX STI |
| 2006-2007 | Subaru | Impreza | WRX |
| 2006-2007 | Subaru | Impreza | WRX Limited |
| 2006-2007 | Subaru | Impreza | WRX TR |
Why Choose Weapon R?
- Proven in motorsport with thousands of Subaru installs worldwide
- Focuses on functional upgrades using premium materials
- Engineered specifically for WRX and STI platforms for exact fit and flow
Frequently Asked Questions
-
Q: Will this fit my 2006 Subaru Impreza WRX?
A: Yes, it bolts directly to 2006-2007 WRX, WRX Limited, and WRX TR models using OEM locations, confirmed compatible across the 02-07 range -
Q: What material is the tank made from?
A: Billet 6061-T6 aluminum with black anodizing to resist corrosion, cracking, and fading from engine heat or road chemicals -
Q: What warranty comes with this part?
A: Backed by Weapon R limited lifetime warranty against manufacturing defects when installed correctly
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Original Weapon R box with protective foam, 10 x 7 x 6 inches
- Weight: 1.8 lbs
Coolant Reservoirs
Coolant reservoirs, also called expansion tanks or overflow bottles, maintain a pressurized coolant supply that the radiator draws from as the cooling system cools down after engine-off. A cracked or leaking reservoir causes coolant loss and eventual overheating, while an upgraded billet or aluminum tank improves appearance and durability in performance engine bays.Popular UpgradesAluminum and billet coolant expansion tanks for LS and LT engine swaps and popular domestic performance vehicles are the most popular upgrades, providing a clean look and superior durability compared to factory plastic bottles that crack from heat cycling. Universal inline overflow tanks made from polished aluminum or anodized billet are popular on custom engine bays where the stock location has been eliminated. Direct-fit OEM-style replacement tanks restore coolant system function on high-mileage vehicles where the factory tank has cracked or the cap seat has deteriorated.How do I know if my coolant reser...
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