Skunk2 307-07-0400 Pro Series 5/8" Intake Plenum Spacer for 2003-05 Nissan 350Z

Vehicle Fitment

• 2003-2005 Nissan 350Z (Coupe/Convertible, 3.5L VQ35DE)
• 2003-2005 Infiniti G35 (Coupe/Sedan, 3.5L VQ35DE)
• 2003-2005 Infiniti FX35 (SUV, 3.5L VQ35DE)
• 2003-2005 Nissan Altima (3.5L VQ35DE)
• 2003-2005 Nissan Maxima (3.5L VQ35DE)

Features

• Thicker 5/8" spacer design increases plenum volume
• Constructed from aerospace thermo-polymer composite for thermal insulation
• Lowers intake air temperatures for improved efficiency
• Improves front-cylinder breathing due to increased plenum volume
• Dyno-proven gains up to 10 + hp
• Integrated injected perimeter seal eliminates need for factory gasket
• Includes bypass hardware for throttle-body water lines
• Direct fitment to OEM intake manifold on supported VQ35DE engines

Specifications

• Spacer thickness: 5/8" (≈ 15.9 mm)
• Material: Aerospace thermo-polymer composite
• Fitment engine: 3.5L VQ35DE V6 (Nissan/Infiniti)
• Compatible vehicles: Nissan 350Z, Infiniti G35, FX35, Nissan Altima, Nissan Maxima
• Strut-tower brace note: May require clearance if using OEM strut tower bar due to raised plenum height

Included Components

• 1x Plenum spacer (5/8") - Skunk2 part # 307-07-0400
• 1x Hardware kit to bypass throttle-body water lines
• 1x Injection moulded perimeter seal/gasket (integrated)

Product Description

The Skunk2 307-07-0400 Pro Series 5/8" Intake Plenum Spacer is engineered specifically for the 3.5 L VQ35DE engines used in vehicles such as the Nissan 350Z, Infiniti G35, FX35, Maxima, and Altima in model years 2003-2005. It upgrades the factory intake system by increasing the plenum volume and insulating it from heat, which allows for cooler intake charge, improved throttle response, and measurable horsepower gains.

Constructed from a high-tech aerospace thermo-polymer composite, this spacer replaces the factory intake manifold spacer/gasket assembly and incorporates a fully injected perimeter seal, eliminating the need for a separate gasket. Install is straightforward, and the included hardware allows bypassing of the throttle-body water lines if required. While installation is direct bolt-on for confirmed models, a note applies for setups using the OEM strut-tower brace - the raised plenum may require a clearance or spacer for the bar.

This part is ideal for enthusiasts seeking a modest performance gain in naturally aspirated or lightly forced VQ35DE builds, particularly for street or track duty. Fitment has been verified through 2005; 2006 and later model coverage is unconfirmed a