Z1 Motorsports Nissan 350Z (07-09) / Infiniti G35 (07-08) VQ35HR CNC Ported Lower Intake Manifold

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The Z1 CNC Ported Lower Intake Manifold for Nissan's 3.5L VQ35HR engine is a stock intake manifold that has been CNC ported using Z1's exclusive port profile to produce significant gains in horsepower and torque across the the entire powerband. This is achieved by opening the runners to their largest possible diameter while maintaining their shape for maximum flow. This manifold fits all models with the VQ35HR engine, including the '07+ 350Z & '07+ G35 Sedan. This upgrade is fairly simple but requires the removal of the upper plenum and fuel rail/injectors. Installation time may take up to 2 hours.

While the Z1 Ported Lower Intake Manifold works very well alone, Z1 recommends the use of our Intake Plenum Power Mod for increased efficiency and power. This can be done simultaneously for moderate power gains on Naturally Aspirated and Forced Induction engines.

In order to maximize the potential of the higher flowing Z1 CNC Ported VQ35HR Intake Manifold, we recommend several other basic upgrades as well as custom tuning. It's best to have your car custom dyno tuned to safely maximize the potential of performance modifications.

Upon removal of this manifold, new lower gaskets are required. New OEM Nissan HR / VHR gaskets can be purchased using the options below.

INSTALLATION NOTE: Completed manifolds may have areas of the intake runner that appear to be un-touched. THIS IS NORMAL. Due to dozens of variables in the casting process, no two castings are the same. Castings are generally assigned a profile tolerance which means the entire geometry must be within a window of dimensional accuracy. This often leaves considerable room for error in the surfaces that are left “as-cast”. Manufacturers identify the areas of critical tolerance and often choose to machine those areas (e.g. sealing surfaces and bolt holes). In the case of VQ intake runners, the runners are as cast and vary by a considerable amount. When hand ported, the technician can touch 100% of the surface to give the runner a uniform look. Though this may look better, the result is no two runners that are the same. However, when CNC porting a defined shape, an identical shape is cut each time. For some castings, this can result in areas of the runner that are un-touched. Know that this is okay. Making those areas even larger, by cutting them, would not improve performance.