Weapon-R 826-123-102 Coolant Overflow Tank for 2003-2006 Infiniti G35

Vehicle Fitment

• 2003-2006 Infiniti G35 (V35, RWD/AWD, 3.5L V6 VQ35DE)
• 2004-2006 Infiniti G35 X (V35, AWD, 3.5L V6 VQ35DE)

Fitment Notes

• Fits V35 chassis G35 models only (coupe and sedan)
• Includes AWD (G35X) and RWD variants
• Does NOT fit 2007+ G35 (V36 chassis)
• Does NOT fit G37 models
• Designed to mount using OEM reservoir mounting locations

Features

• High-capacity coolant overflow / catch tank design
• Constructed from billet 6061 aluminum for durability
• TIG-welded seams for leak-free performance
• Integrated fluid level viewing window
• Prevents coolant overflow during high-temperature operation
• Improves cooling system reliability under performance driving
• Vehicle-specific design for direct bolt-on installation
• Corrosion-resistant aluminum construction
• Designed for both street and track applications

Specifications

• Part Number: 826-123-102
• Product Type: Coolant Overflow / Catch Tank
• Material: 6061 Billet Aluminum
• Construction: TIG Welded
• Finish: Polished Aluminum (Neo-Ti optional variant)
• Engine Compatibility: 3.5L V6 VQ35DE
• Chassis: V35 platform
• Position: Engine bay coolant reservoir replacement

Included Components

• 1x Aluminum coolant overflow tank
• 1x Mounting bracket
• 1x Stainless steel clamp set
• 1x Clear reinforced hose (approx. 3 ft)

Product Description

The Weapon-R 826-123-102 Coolant Overflow Tank is a direct-fit upgrade for the Infiniti G35 V35 platform, designed to replace the factory plastic coolant reservoir with a more durable and performance-oriented solution. Built from billet 6061 aluminum and TIG welded for strength, this tank is engineered to handle the increased pressure and temperature demands of spirited driving and track use.

Featuring an integrated viewing window and high-quality fittings, this overflow tank helps manage excess coolant safely by capturing overflow during high heat conditions and allowing it to return to the system as temperatures normalize. Designed to mount directly to OEM locations with no modification required, it offers both functional reliability and a clean, performance-focused engine bay appearance.