Description
Product Fitment:
2002-2007 Subaru WRX
2004-2007 Subaru STI
The IAG Performance Aluminum Coolant Expansion Tank is engineered for custom Subaru builds seeking a clean, race-inspired engine bay. Designed to relocate the coolant expansion tank from the intake manifold to the passenger-side front strut tower, this upgrade creates valuable space for rotated turbo setups and improves under-hood aesthetics and functionality.
Key Features:
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Race-Inspired Design:
Relocates the coolant expansion tank to the front strut tower for more clearance and improved engine bay layout. -
Durable Construction:
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Made from 1/8″ thick aluminum
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Precision waterjet cut, bent, and TIG welded for strength and durability
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High-Quality Fittings:
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Includes a -8 AN turbo coolant return fitting
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-8 AN drain outlet fitting and 0.25″ barb for overflow
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Premium Finish:
Powder-coated in black or red for corrosion resistance and a clean appearance
Features laser-engraved IAG logo for a professional look -
Easy to Install:
Integrated mounting brackets and included hardware make for a straightforward installation
Includes:
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(x1) IAG Aluminum Expansion Tank (Black or Red Powder-Coated Finish)
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(x2) Bolts
Installation Notes:
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Requires custom hoses and fittings (not compatible with OEM hoses)
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Not compatible with COBB airbox
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May require relocation of boost solenoid valves
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Professional installation recommended






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