aFe Power Sprint Booster Power Converter 01-17 BMW 1/2/3/4 Series (AT/MT)

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 u nique serrated/helix entry to create turbulence at the manifold while eliminating the annoying whistle found in other helix only throttle spacers.Installation InstructionsThis Part Fits: Year Make Model Submodel 2011 BMW 1 Series M Base 2008-2013 BMW 128i Base 2008-2013 BMW 135i Base 2014-2016 BMW 228i Base 2015-2016 BMW 228i xDrive Base 2017-2021 BMW 230i Base 2017-2021 BMW 230i xDrive Base 2013-2018 BMW 320i Base 2013-2018 BMW 320i xDrive Base 2001-2006 BMW 325Ci Base 2001-2006 BMW 325i Base 2001-2006 BMW 325xi Base 2014-2018 BMW 328d Base 2014-2018 BMW 328d xDrive Base 2007-2016 BMW 328i Base 2014-2016 BMW 328i GT xDrive Base 2009-2016 BMW 328i xDriv