Mishimoto MMHOSE-350Z-03BK Black Silicone Hose Kit 2003-2006 Nissan 350Z VQ35DE

Vehicle Fitment

• 2003-2006 Nissan 350Z (Z33, Base / Enthusiast / Touring / Track / 35th Anniversary Edition, VQ35DE 3.5L V6, RWD)
• 2003-2007 Infiniti G35 Coupe (V35, VQ35DE 3.5L V6, RWD)
• 2003-2007 Infiniti G35 Sedan (V35, VQ35DE 3.5L V6, RWD / AWD)

Fitment Notes

• Fits VQ35DE engine applications only. Does NOT fit vehicles equipped with the VQ35HR engine - the 2007 Nissan 350Z and later G35 models with the revised VQ35HR use a different cooling system layout and are not compatible with this hose kit.
• Compatible with both manual (FS6R31A) and automatic (RE5R05A) transmission variants.
• Hose clamps are not included - existing OEM clamps or aftermarket replacements must be reused or sourced separately.
• This is the black colorway. Sister SKUs for the same fitment are available in blue (MMHOSE-350Z-03BL) and red (MMHOSE-350Z-03RD).
• Maximum operating temperature: 330°F (165°C).

Features

• Direct OEM-fit replacement radiator hose kit engineered specifically for the 2003-2006 Nissan 350Z and 2003-2007 Infiniti G35 with VQ35DE engine - no cutting, trimming, or modification required.
• Dual-layer construction combines high-grade silicone with heat-resistant embedded fibers, providing superior pressure tolerance and thermal resistance versus stock rubber hoses that degrade over time from heat, oil, and coolant exposure.
• Maximum operating temperature of 330°F ensures reliable performance in all driving conditions, including sustained high-load operation, track use, and high ambient temperature environments.
• Silicone construction permanently resists cracking, swelling, hardening, and collapse - common failure modes of OEM rubber hoses that can lead to coolant leaks and engine overheating.
• Full kit covers all primary coolant hose positions - upper radiator hose, lower radiator hose, bypass hose, and heater hoses - for a complete, uniform silicone coolant routing upgrade in a single purchase.
• Increases pressure tolerance throughout the cooling system, supporting higher-pressure cooling system applications and aftermarket radiator cap upgrades without hose failure risk.
• Black finish provides a clean, stealthy engine bay appearance - a subtle performance upgrade over the stock rubber hose color that complements both OEM and modified engine bays.
• Pairs ideally with the Mishimoto Performance Aluminum Radiator (MMRAD-350Z-03) and racing thermostat (MMTS-350Z-03L) for a comprehensive cooling system overhaul.
• Backed by the Mishimoto Lifetime Warranty - designed in Delaware, USA.

Specifications

• Hose Material: Dual-layer high-grade silicone with heat-resistant embedded fibers
• Color: Black
• Maximum Operating Temperature: 330°F (165°C)
• Hoses Included: Upper radiator hose, lower radiator hose, bypass hose, heater hoses
• Clamps Included: No - OEM or aftermarket clamps must be reused or sourced separately
• Engine Code: VQ35DE
• Chassis Codes: Z33 (350Z), V35 (G35)
• Drivetrain: RWD (350Z); RWD and AWD (G35)
• Transmission Compatibility: Manual (FS6R31A) and Automatic (RE5R05A)

Included Components

• 1x Upper radiator hose, black silicone
• 1x Lower radiator hose, black silicone
• 1x Bypass hose, black silicone
• 2x Heater hoses, black silicone
• Mishimoto Lifetime Warranty

Product Description

The Mishimoto MMHOSE-350Z-03BK is a direct-fit silicone radiator hose kit engineered as a complete replacement for every OEM coolant hose on the 2003-2006 Nissan 350Z and 2003-2007 Infiniti G35 equipped with the VQ35DE 3.5L V6. The factory rubber hoses on these platforms are subject to the same degradation that affects all OEM rubber cooling hoses over time - heat cycling, coolant chemical exposure, and age progressively cause the material to harden, crack, and eventually fail, leading to coolant leaks that can escalate quickly into engine overheating. Mishimoto's silicone hoses eliminate this failure mode entirely. The dual-layer construction combines high-grade silicone with internally embedded heat-resistant fibers, producing a hose that resists cracking, swelling, collapse, and hardening at temperatures up to 330°F - well beyond the thermal range of any stock operating condition or performance driving scenario.

The kit is a direct OEM replacement for the upper radiator hose, lower radiator hose, bypass hose, and heater hoses - covering the complete primary coolant circuit in a single purchase. Every hose is formed to match the OEM geometry of the VQ35DE cooling system, ensuring a precise fit at each connection point with no modification required. Silicone also provides increased pressure tolerance compared to rubber, meaning the hoses are better suited to higher-pressure cooling system configurations that accompany a radiator cap upgrade, high-performance thermostat, or any build that puts additional stress on the cooling circuit. The black finish gives the engine bay a clean, uniform appearance that reads as a thoughtful detail upgrade without being overtly flashy - complementing both stock and modified VQ-powered builds equally well.

This kit is specific to the VQ35DE engine and is not compatible with vehicles equipped with the revised VQ35HR, which uses a different coolant routing layout. Affected vehicles include the 2007 Nissan 350Z and later Infiniti G35 models with the HR-spec engine - owners should confirm their engine code before ordering. Hose clamps are not included; existing OEM clamps should be reused if in good condition, or aftermarket replacements sourced separately. This hose kit pairs naturally with the Mishimoto Performance Aluminum Radiator (MMRAD-350Z-03) and Mishimoto racing thermostat (MMTS-350Z-03L) to form a complete cooling system overhaul for the Z33/V35 platform. Covered by the Mishimoto Lifetime Warranty.