GKTech Nissan S14 240sx/S15 Silvia Replacement Overflow coolant tank

The GKTech Replacement Overflow Coolant Tank is a high-quality alternative to the brittle, yellowed, or cracked factory plastic tank found on the Nissan S14 240SX and S15 Silvia. Constructed from laser-cut and TIG-welded aluminum, this tank is built to withstand the heat and abuse of performance driving while also offering a clean, race-ready look under the hood.

Designed as a direct bolt-in replacement for the OEM reservoir, it includes an integrated sight tube for easy coolant level checks and mounts to the factory location using OEM hardware. Whether you’re refreshing your cooling system or upgrading for track duty, this tank is a functional and aesthetic improvement over stock.

Key Features:

• Direct Replacement for OEM Tank: Fits perfectly in factory location

• Durable Aluminum Construction: TIG-welded and corrosion-resistant

• Integrated Sight Tube: Easily monitor coolant levels at a glance

• Clean, Functional Design: Improves engine bay aesthetics and reliability

Specifications:

• Material: TIG-welded aluminum

• Finish: Raw or black anodized (varies by availability)

• Mounting: Bolts to OEM bracket using factory hardware

• Install Time: ~15–30 minutes

Compatibility:

• Nissan S14 240SX (RWD)

• Nissan S15 Silvia (RWD)
  Fits OEM radiator support mounting points

What’s Included:

• (1) Overflow coolant tank

• (1) Pre-installed sight tube

• (1) Mounting hardware kit (if required)

Notes:

• Does not include coolant hose—reuse your OEM line or replace as needed

• Ideal for track cars, drift builds, or street cars needing an upgrade

• Pair with GKTech radiator panels or cooling upgrades for best performance

Say goodbye to faded plastic and upgrade your cooling system with the GKTech Overflow Tank—a sleek and functional solution that keeps your engine bay cool and clean.