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:
BMW 540i 97-03 (E39) V8-4.4L
BMW X5 04-06 (E53) V8-4.4L
BMW 645Ci 04-05 (E63/64) V8-4.4L
BMW 650i 06-09 (E63/64) V8-4.8L
BMW 750i 06-09 (E65/66) V8-4.8L
This throttle body spacer is 50-state legal (CARB E.O Number D-550-11).
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