BUY NOW, PAY LATER. Starting at 0% APR 
The serrated/helix design of the aFe Power Silver Bullet Throttle Body Spacer creates air turbulence in the intake manifold. This turbulence increases the air pressure in the combustion chamber, resulting in increased performance and improved throttle response. The serrated/helix combination design also reduces intake whistle that occurs with helix-only designs.