aFe Nissan Frontier 20-22 V6-3.8L Silver Bullet Throttle Body SpaceraFe Nissan Frontier 20 22 V6 3. 8L Silver Bullet Throttle Body Spacer The Serrated Helix combination design creates intake turbulence in the combustion chamber. This turbulence breaks up the fuel which creates a more complete combustion cycle increasing horsepower, torque and improving throttle response. The Serrated Helix combination design also reduces intake whistle that occurs with Helix only designs (US PAT 07055513). All Silver Bullet Throttle