Silver Bullet Throttle Body Spacer aFe POWER AFE Power 46 36007 aFe Silver Bullet Throttle Body Spacers Summit Racing AFE 46 31001 AFE Silver Bullet Throttle Body Spacer aFe 46 32010 Silver Bullet Throttle Body Spacer. Serrated Helix Design: 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. 6061 T6 Billet Aluminum Construction: All Silver Bullet Throttle Body Spacers are constructed from 6061 T6 billet aluminum precision machined for light weight, high strength and perfect fit and finish. Longer Intake Tract: Adding a Silver Bullet Throttle Body spacer lengthens the intake tract which helps increasing intake air speed increasing performance and improved throttle response. Installation Is A Snap: This Silver Bullet throttle body spacer uses all factory mounting locations providing stability and a hassle free installation. Emissions Disclaimer: Some or all of the applications listed are 50 state exempt, please see D 550 42 for details. Fitment Note: Compatible w aFe POWER P N: 51 54 75 76009 or 51 54 75 76010 air intake systems. Silver Bullet throttle body spacers create turbulence in the air flow at the point just before entry to the engine increasing performance, as well as improving throttle response. Dyno Proven Gains up to +6 HP & +9 Lbs. x Ft. TQ CNC Machined from Durable 6061 T6 Billet Aluminum Unique Serrated Helix Entry Design Creates Turbulence and Reduces Whistle Sound Increases Air Speed, Improving Performance and Throttle Response 2010 2023 Toyota 4Runner Gas V6 4. 0L 2010 2014 Toyota FJ Cruiser Gas V6 4. 0L 2015 2023 Toyota FJ Cruiser Non US model Gas V6 4. 0L 2010 2023 Toyota Land Cruiser Prado Non US Model Gas V6 4. 0L