Alpha Performance Big Bore Billet Throttle Bodies for Nissan GTR R35 VR38 brand_Injector Dynamics Power gains with the 981

Power gains with the 981 Competition Plenum are virtually the same as with the 987

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Front Spring Rate

Up to 45 channels of Input & Output (I/O) expansion (via CAN)

Tapered I-Beam with undercut beam profile optimizes strength-to-weight

Alpha Performance Big Bore Billet Throttle Bodies for Nissan GTR R35 VR38 brand_Injector Dynamics Power gains with the 981Alpha Performance Big Bore Billet Throttle Bodies for Nissan GTR R35 VR38 Maximum Airflow For Your Hungry VR38 Engine At around 800HP, your stock throttle bodies become a restriction to the intake system. The negative effects of this bottleneck are exacerbated exponentially as power increases from there on. By enlarging the diameter of the throttle bodies from the stock 60mm (ID) to a massive 73. 5mm (ID), we increased the cross sectional area by 50%.