-8%
Mishimoto Mishimoto 08+ Subaru WRX/STI Black Aluminum Coolant Overflow Tank
Mishimoto Mishimoto 08+ Subaru WRX/STI Black Aluminum Coolant Overflow Tank
Mishimoto Mishimoto 08+ Subaru WRX/STI Black Aluminum Coolant Overflow Tank
Click to zoom in

Mishimoto 08+ Subaru WRX/STI Black Aluminum Coolant Overflow Tank

Mishimoto
MISMMRT-STI-08BK
748354025729
Coolant Reservoirs
11 Units In Stock - Ships Next Business Day
$ 257.00 $ 233.95
$ 233.95

SKU: MMRT-STI-08BK | UPC: 748354025729

Mishimoto 2008+ Subaru WRX/STI Black Aluminum Coolant Overflow Tank

Replace the fragile plastic coolant overflow tank in your 2008+ Subaru WRX or STI with Mishimoto's black aluminum version for lasting reliability in the engine bay. This direct-fit reservoir withstands extreme heat cycles that crack stock units while adding a clean look that complements any build. Engineered for 2008-2016 Impreza WRX/STI models and 2015-2016 WRX/STI with precise fitment to stock or Mishimoto radiators.

Key Features

  • TIG-Welded Aluminum Construction: Built from solid aluminum to prevent cracking and leaks from repeated thermal expansion unlike brittle OEM plastic tanks
  • CNC-Machined Dipstick: Billet aluminum dipstick provides quick accurate coolant level readings without removing the cap
  • Black Anodized Finish: Protects against corrosion and delivers a stealth appearance that blends with blacked-out engine bays
  • 1.2L Increased Capacity: Larger volume than stock 0.8L reservoir holds more coolant for sustained performance during track days or hard driving
  • Direct Bolt-On Fit: Matches OEM mounting points and works seamlessly with factory hoses or Mishimoto radiator setups

Product Notes

  • Complete replacement kit includes tank dipstick and mounting hardware for straightforward swap
  • Retains factory coolant cap compatibility for plug-and-play installation
  • Packed in protective foam inserts to prevent shipping damage

Installation Notes

  • Professional installation recommended.
  • Bolt-on process takes 30-60 minutes with basic hand tools
  • Uses existing OEM hose routing and mounting brackets

This Part Fits

Year Make Model Submodel
2008-2014 Subaru Impreza WRX
2010-2014 Subaru Impreza WRX Limited
2009-2014 Subaru Impreza WRX Premium
2008-2014 Subaru Impreza WRX STI
2011-2014 Subaru Impreza WRX STI Limited
2010 Subaru Impreza WRX STI Special Edition
2015-2016 Subaru WRX Base
2015-2016 Subaru WRX Limited
2015-2016 Subaru WRX Premium
2015-2016 Subaru WRX STI Base
2015 Subaru WRX STI Launch Edition
2015-2016 Subaru WRX STI Limited
2016 Subaru WRX STI Series.HyperBlue

Why Choose Mishimoto?

  • Trusted by motorsport teams for direct-fit cooling solutions
  • Every part tested for OEM-level fit and extended durability
  • Backed by Lifetime Warranty against defects

Frequently Asked Questions

  • Q: Will this fit my 2015 Subaru WRX STI Limited?
    A: Yes it bolts directly to 2015-2016 WRX STI Limited models using factory mounts and hoses with no modifications
  • Q: What finish options are available?
    A: This model features durable black anodized aluminum other finishes like polished are sold separately
  • Q: What does the Lifetime Warranty cover?
    A: Covers manufacturing defects for the original owner when installed and used properly direct replacement provided

Shipping & Handling

  • Method: UPS or FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Secure Mishimoto box 10.5 x 7.5 x 7.5 inches
  • Weight: 1.3 lbs product 2.0 lbs shipping

Request For Information

Have questions about ? Fill out the form below and we'll get back to you by the next business day.
Coolant Reservoirs

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...

View Coolant Reservoirs Products
Cooling

Cooling

Shop performance cooling parts at Black Ops Auto Works for premium radiators, thermostat housings, thermostats, coolant reservoirs, expansion tanks, radiator hoses, oil coolers, transmission coolers, fans and shrouds, water pumps, and thermal management upgrades for street, track, towing, diesel, and high-horsepower builds. Whether you are trying to control engine temps, improve reliability, or support demanding performance use, this collection is built around proven cooling-system upgrades for serious enthusiasts. Shop Cooling Parts by Category Browse automotive cooling system components across key product categories, including: Radiators Coolant reservoirs and expansion tanks Thermostat housings and thermostats Radiator hose kits and silicone coolant hoses Oil coolers and oil cooler accessories Transmission coolers Coolant bypass kits and coolant filters Fans and shrouds Radiator caps Water pumps Radiator shrouds, radiator stays, and cooling plates Thermal wrap, thermal tape, an...

View Cooling Products
Engine

Engine

This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...

View Engine Products
Mishimoto

Mishimoto

Shop premium Mishimoto performance parts at Black Ops Auto Works, including Mishimoto radiators, intercoolers, oil coolers, baffled catch cans, silicone radiator hoses, thermostats, intake systems, charge pipes, transmission coolers, exhaust tips, wheel accessories, and universal cooling components. Mishimoto is a leading aftermarket brand for performance cooling, airflow, oil control, and engine bay upgrades. Whether you are building a street car, track car, tow rig, diesel truck, Jeep, off-road SUV, or daily driver, this collection helps you find Mishimoto parts by brand, vehicle application, and product category. Shop Mishimoto Cooling, Intake & Performance Parts Black Ops Auto Works carries a wide selection of Mishimoto aftermarket parts for cars, trucks, SUVs, Jeeps, diesel applications, and universal performance builds. Mishimoto Radiators & Cooling Components - performance aluminum radiators, coolant hoses, thermostats, expansion tanks, and thermal bypass solutions ...

View Mishimoto Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×