aFe Power Silver Bullet Throttle Body Spacer - Honda Civic Si 12-15 L4-2.4L HXY2121 Steel high RPM fans are

Steel high RPM fans are available in 15"

Trick Race Parts specializes in tire siping equipment for dirt modified racing

Air Suspension Compressor Kit

OE Replacement

fail safe" valve

aFe Power Silver Bullet Throttle Body Spacer - Honda Civic Si 12-15 L4-2.4L HXY2121 Steel high RPM fans areSilver 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.