Radium Engineering Coolant Expansion Tank Kit for Nissan GT-R R35 - 20-0557

Direct OEM Replacement: Replaces the factory plastic coolant expansion tank without permanent vehicle modifications

Billet Aluminum Construction: Two-piece CNC-machined aluminum design offers improved strength and durability

Improved Heat Management: Aluminum construction provides superior thermal conductivity compared with plastic

Dual-Chamber Internal Design: Crossover passages at the top and bottom support consistent coolant circulation

Integrated Swirl Feature: Helps separate trapped air from the coolant for improved system de-aeration

Compact Engine Bay Fitment: Reduced tank size creates more room for modifications and easier engine access

Factory-Line Compatibility: Supplied adapter fittings connect to the original cooling system lines

Street and Race Ready: Robust metal construction is suitable for performance street and motorsport applications

Pressure Cap Options: Reuses the OEM Nissan cap or accepts compatible Radium Engineering Type-A caps

Brand: Radium Engineering

Manufacturer Part Number: 20-0557

Part Type: Coolant expansion tank kit

Tank Construction: Two-piece CNC-machined billet aluminum

Finish: Anodized

Internal Design: Dual chamber with upper and lower crossover passages

De-Aeration Feature: Internal swirl design

Mounting Method: Vehicle-specific bracket using existing threaded holes

Cooling System Function: Retains factory expansion tank operation

Pressure Cap Compatibility: OEM Nissan 1.37-bar pressure cap or compatible Radium Engineering Type-A cap

Includes: Two-piece billet aluminum coolant tank

Includes: Aluminum mounting bracket

Includes: Aluminum adapter fittings

Includes: 7/32-inch overflow hose

Includes: Stainless steel mounting hardware

Not Included: Optional Radium Engineering coolant tank pressure cap

Radium Engineering is an American performance-parts manufacturer specializing in advanced fuel-delivery, crankcase-ventilation and fluid-management components. Owner-operated and based in Clackamas, Oregon, Radium has developed automotive products since 2010 using in-house research, computer simulation, 3D modeling and extensive product testing. Its catalog includes fuel rails, fuel-pressure regulators, fuel-pump hangers, surge tanks, fuel cells, filters, catch cans, air-oil separators, coolant tanks, fittings and complete vehicle-specific fuel systems. Radium products are developed for performance street cars and motorsport applications, with an emphasis on functionality, precise fitment and clean visual design.

For Nissan Skyline GT-R and R35 GT-R builds, Radium offers dedicated components for the RB26DETT and VR38DETT platforms. Its Skyline catalog includes RB26 fuel rails, catch-can kits, fuel-pump hangers, surge-tank systems and complete fuel-delivery packages for the R32, R33 and R34 GT-R. R35 products include fuel rails, pump hangers, fuel-filter mounts, complete fuel-delivery systems, catch cans, coolant tanks, fuel-line retainers and GR6 transmission filters. These products give GT-R builders options ranging from a simple engine-bay upgrade to a complete high-flow fuel system for gasoline, ethanol or other compatible racing fuels. Exact pump compatibility, vehicle configuration and installation requirements should be confirmed for each product before ordering.

Radium Engineering-branded products include a one-year limited manufacturer’s warranty from the original purchase date. Coverage applies to the original purchaser and protects against defects in Radium materials or workmanship. After inspection, Radium may repair or replace an approved product at its discretion. Warranty coverage cannot exceed the product’s original purchase price.

The warranty does not cover:

• Improper installation or incorrect use
  
• Product modification, abuse or unauthorized repair
  
• Labor, towing or other secondary expenses
  
• Damage to the vehicle or surrounding components
  
• Third-party products supplied with a Radium kit

Fuel pumps, turbochargers and other non-Radium components are covered only by their original manufacturer, even when purchased with a Radium product. Radium specifically states that it does not administer warranty coverage for fuel pumps.

To begin a claim, contact Elite GT-R Parts with your order number, Radium part number, a description of the issue and clear photographs or video. Relevant installation and vehicle information may also be requested. Do not modify or return the product before receiving instructions. An approved RMA, proof of purchase and the failed component are required, and Radium must receive the return within 14 days after issuing the RMA. The customer is responsible for prepaid shipping to Radium for inspection. Final warranty eligibility and resolution are determined by Radium Engineering.