aFe Power Silver Bullet Throttle Body Spacer for Select 2006-2013 BMW (L6-3.0L) - 46-31011

Fits select 2006-2013 BMW 128i, 325i, 325xi, 328i, 328i xDrive, 328xi, 330i, and 330xi (L6-3.0L N52).

The aFe Power Silver Bullet throttle body spacer is engineered to improve throttle response and mid-range torque by optimizing the airflow into your intake manifold. It features a patented serrated/helix design (US PAT 07055513) that creates turbulence just before the air enters the combustion chamber. This increased air velocity and pressure result in improved combustion efficiency and overall performance gains. The unique entry design is also specifically tuned to reduce the intake whistle sound common with standard helix-style spacers.

Each Silver Bullet is precision CNC-machined from 6061-T6 billet aluminum, providing a lightweight yet high-strength solution with a stealthy black anodized finish. The kit includes high-quality machined screws for a secure installation that bolts directly to the factory manifold without damage. This spacer is compatible with both the factory airbox and several aFe Power intake systems.

• Dyno-proven gains up to +4 HP and +7 lbs. x ft. torque when used with aFe Power P5R air filter (30-10131)
• Dyno-proven gains up to +3 HP and +5 lbs. x ft. torque with factory air filter
• Patented serrated/helix entry increases air speed and reduces whistle
• Precision CNC-machined from 6061-T6 billet aluminum
• Corrosion-resistant black anodized finish
• Fits aFe Power intake P/N: 51/54-81012-B, 51/54-81012-C, and 54-13053D/R
• Includes all necessary installation hardware
• Manufacturer Part Number: 46-31011