aFe Silver Bullet Throttle Body Spacers TBS BMW (E53) 00-06 5series (E39) 97-09 6series (E63/64)

Silver Bullet throttle body spacers create turbulence in the air flow at the point just prior entry into the engine increasing horsepower, torque and improving throttle response and fuel efficiency. 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. Silver Bullet Throttle Body Spacer Kit BMW X5 (E53) 00-06 V8-4.4/4.6L BMW X5 (E53) 00-06 V8-4.4/4.6L Fitment: BMW 528i Base 2009 BMW 528i xDrive Base 2009 BMW 535i Base 2009 BMW 535i xDrive Base 2009 BMW 540i Base 1997 to 2003 BMW 545i Base 2004 to 2005 BMW 550i Base 2006 to 2009 BMW 645Ci Base 2004 to 2005 BMW 650i Base 2006 to 2009 BMW 745i Base 2002 to 2005 BMW 745Li Base 2002 to 2005 BMW X5 4.4i 2000 to 2006 BMW X5 4.6is 2002 to 2003 BMW X5 4.8is 2004 to 2006