Silver Bullet Throttle Body Spacer Kit Acura TLX 15-20 V6-3.5L46 37004 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 +5 HP & +10 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