SKU: 63780 | UPC: 84663637803
Moroso 90-97 Mazda Miata Coolant Expansion Tank - Direct Bolt-In Replacement
The Moroso 63780 is a cast aluminum coolant expansion tank engineered as a direct replacement for the factory plastic unit on 1990-1997 Mazda Miata models. It fits securely using OEM mounting points with no modifications required. This tank delivers 38 ounces of capacity to maintain optimal coolant levels during spirited driving or track sessions while resisting cracks and heat damage common in stock tanks.
Key Features
- Cast Aluminum Build: Provides long-lasting durability and superior heat dissipation compared to brittle factory plastic tanks
- 38 oz Capacity: Extra volume prevents overflow and ensures consistent cooling under high-demand conditions
- Direct Bolt-On Design: Matches factory locations on the inner fender for simple installation on NA Miatas
- High-Pressure Cap Included: Maintains system pressure for efficient coolant flow and boiling point elevation
- Black Textured Finish: Resists corrosion and adds a clean look to the engine bay
Product Notes
- Ideal replacement for worn stock tanks prone to failure from age or heat cycling
- Suitable for street, autocross, or track use with Miata's 1.6L or 1.8L engines
- Pressure tested for leak-free performance right out of the box
Installation Notes
- Professional installation recommended.
- Bolts to factory inner fender bracket using existing hardware
- Transfer OEM hoses and cap from stock tank or use included cap
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1990-1993 | Mazda | Miata | 1.6L |
| 1994-1997 | Mazda | Miata | 1.8L |
Why Choose Moroso?
- Decades of motorsports experience since 1958 with proven cooling solutions
- High-strength materials built to withstand racing demands
- Precision fitment verified for exact vehicle compatibility
Frequently Asked Questions
-
Q: Will this tank fit all 1990-1997 Mazda Miatas?
A: Yes it bolts directly to the factory mounting bracket on NA models with 1.6L or 1.8L engines without any cutting or fabrication -
Q: What material is used and what is the capacity?
A: Cast aluminum construction holds 38 ounces of coolant for added reserve and heat management -
Q: Does it include installation hardware or a cap?
A: Uses stock mounting hardware and includes a high-pressure cap rated for performance cooling systems
Shipping & Handling
- Method: Ground shipping via UPS or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Protective box dimensions 10.8 x 5.3 x 7.5 inches
- Weight: 2.25 lbs
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