This Silver Bullet throttle body spacer produced 10hp and 14lbs. x ft. of torque by creating turbulence in the air flow at the point just prior entry into the engine. Silver Bullet throttle body spacers are constructed out of durable T-6061 billet aluminum and using a unique serrated/helix entry to create turbulence at the manifold while eliminating the annoying whistle found in other helix only throttle spacers. This is a great bang for the buck add-on product.
This Spacer Fits:
1997-2003 BMW 540i (E39) V8-4.4L
2004-2006 BMW X5 4.4i (E53) V8-4.4L
2004-2005 BMW 645Ci (E63/64) V8-4.4L
2006-2009 BMW 650i (E63/E64) V8-4.8L
2006-2009 BMW 750i (E65/E66) V8-4.8L
This throttle body spacer is 50-state legal (CARB E.O Number D-550-11/D-550-17).
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