370Z/G37 Upper Intake Manifold | Fits 2009-2020 Nissan 370Z & 2008-2013 Infiniti G37/Q60 | Fits VQ37VHR | High-Flow Plenum | +8-15 WHP Gains | CNC Ported & Polished

Unlock top-end power from your 2009-2020 Nissan 370Z or 2008-2013 Infiniti G37/Q60 with this Upper Intake Manifold upgrade engineered specifically for the VQ37VHR, because the factory plastic plenum is designed for emissions and low-end torque but becomes a major restriction above 5k RPM where the VHR wants to breathe, while this high-flow cast aluminum or CNC billet plenum uses enlarged runners, a larger internal volume, and radiused bellmouths to dramatically increase airflow velocity and distribution to all 6 cylinders, delivering real +8-15 WHP gains with supporting bolt-ons and a proper tune, and it’s a direct bolt-on replacement for all 370Z Base, Touring, Sport, Nismo and G37/Q60 Coupe, Sedan, Convertible, AWD, IPL VQ37VHR models using your factory lower intake, throttle bodies, sensors, and vacuum lines with no cutting or modifications, and the internal design eliminates the restrictive sharp turns and uneven flow of the OEM plenum to fix the infamous cylinder 5/6 lean condition on tuned VHRs, giving you safer AFRs and more consistent power across the bank, and every manifold is CNC-ported and hand-polished for smooth laminar flow then pressure-tested for leaks and vacuum sealed, and the larger plenum volume increases throttle response and adds a deeper, aggressive intake growl under WOT that pairs perfectly with cold air intakes and exhaust headers, and it retains all factory PCV, brake booster, and EVAP ports so you stay emissions-friendly with no CEL on a stock ECU, though a tune is required to capitalize on the airflow and adjust fueling, and the low-profile design clears stock and aftermarket strut bars and hoods while the durable aluminum construction dissipates heat better than plastic to reduce IATs during back-to-back pulls, making this the best bolt-on top-end mod for your 370Z or G37/Q60 if you’ve already done intakes, headers, and exhaust and need the VQ37VHR to finally breathe up top without going forced induction.