Mishimoto Rockstar Aluminum Coolant Expansion Tank - 2002-2007 Subaru WRX / 2004-2021 STI
Mishimoto Rockstar Aluminum Coolant Expansion Tank - 2002-2007 Subaru WRX / 2004-2021 STI
Mishimoto
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Every product is sourced from authorized manufacturers or distributors. If something isn’t right with fitment or condition, we’ll work with you to resolve it fairly.
NO GUESSWORK,
JUST PARTS THAT WORK.
Let’s finish that car.
PRODUCT DETAILS
RallySport Direct carries a large selection of performance cooling products brought to you by Mishimoto.
Here, you are looking at the Mishimoto Rockstar Aluminum Expansion Tank. This has been made using durable aluminum materials to replace the factory unit to be durable and to provide a nice aesthetic upgrade to the engine bay.
DETAILS:
- Direct fitment
- 100% aluminum, fully-welded construction for maximum durability during repeated temperature transitions
- 50% greater coolant capacity than the stock plastic coolant expansion tank
- Leak-free welded CNC barb fittings
- Includes Rockstar branded radiator cap
- Powder-coated a black finish
WHY WE CARRY THIS
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
- Fitment-first mindset — no “universal” roulette
- Brand reputation matters — we favor proven manufacturing
- Support that actually responds with real answers
WHAT TO EXPECT
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
TRUST, BUILT INTO THE PROCESS.
Anyone can list parts. We curate what belongs on a serious build. Our goal is simple: fewer surprises, cleaner installs, and confidence when you hit “Buy.”
Fitment checked
We prioritize vehicle-specific listings and clear selection logic so you’re not gambling on compatibility.
Brand discipline
Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
RallySport Direct carries a large selection of performance cooling products brought to you by Mishimoto.
Here, you are looking at the Mishimoto Rockstar Aluminum Expansion Tank. This has been made using durable aluminum materials to replace the factory unit to be durable and to provide a nice aesthetic upgrade to the engine bay.
DETAILS:
- Direct fitment
- 100% aluminum, fully-welded construction for maximum durability during repeated temperature transitions
- 50% greater coolant capacity than the stock plastic coolant expansion tank
- Leak-free welded CNC barb fittings
- Includes Rockstar branded radiator cap
- Powder-coated a black finish
