aFe Silver Bullet Throttle Body Spacer 07-13 BMW 328i (E90/E91/E92/E93) L6-3.0L N52

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 and fuel efficiency. Dyno-Proven Gains up to +4 HP & +7 Lbs. x Ft. TQ w/ Throttle Body Spacer and aFe POWER P5R Air Filter (30-10131) Dyno-Proven Gains up to +3 HP & +5 Lbs. x Ft. TQ w/ Throttle Body Spacer and Factory Air Filter CNC-Machined from Durable 6061-T6 Billet Aluminum Unique Serrated/Helix Entry Design Creates Turbulence and Reduces Whistle Sounds Increases Air Speed, Improving Performance and Throttle Response Black Anodized Finish for a Stealthy Look Fits w/ aFe POWER Intakes P/N: 51/54-81012-B/C and 54-13053R/D Serrated/Helix Design:The serrated/helix design (US PAT 07055513) creates turbulence in the intake manifold and increases air pressure in the combustion chamber for better performance. This unique entry design also reduces intake whistle that commonly occurs with other helix-onl