One of the easiest additions to improve low end horsepower and torque to your VQ35 is the Silver Bullet Throttle Body Spacer. The TBS has both a Serrated and Helix combination design, which creates air turbulence in the intake manifold, increasing the air pressure in the combustion chamber. This design also reduces intake whistle that occurs with other helix-only designs. Serrated/Helix Design: The Serrated/Helix design creates air turbulence in the intake manifold, increasing the air pressure in the combustion chamber resulting in increased horsepower, torque and improved throttle response. The Serrated/Helix combination design also reduces intake whistle that occurs with other helix only designs. (US PAT 07055513). 6061-T6 Billet Aluminum Construction: All Silver Bullet Throttle Body Spacers are precision machined from 6061-T6 billet aluminum for lightweight, high strength and perfect fit and finish. Installation Is A Snap: This Silver Bullet throttle body spacer uses all factory mounting locations, and supplied gaskets provide perfect seal and a hassle-free installation. Silver Bullet Throttle Body Spacer Kit Nissan 350Z 03-06/Alitima 03-05/Infiniti G35 03-07 V6-3.5L (VQ35DE) Nissan 350Z 03-06/Alitima 03-05/Infiniti G35 03-07 V6-3.5L (VQ35DE)