aFe Silver Bullet Throttle Body Spacers TBS 14 BMW 435i (F32) / 12-15 BMW 335i (F30) BMW 335i (F30) 1972-pontiac-grand-prix-base-esi2360279 FC2-HDSS kit features ACT's most

FC2-HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc

CNC machined nylon bushings are included which are Moly (Molybdenum) impregnated for reduced friction and wear

SB019X is an ACT pressure plate that uses exclusive diaphragm design to increase clamp load

When tuning an engine using wideband AFR feedback control

aFe Silver Bullet Throttle Body Spacers TBS 14 BMW 435i (F32) / 12-15 BMW 335i (F30) BMW 335i (F30) 1972-pontiac-grand-prix-base-esi2360279 FC2-HDSS kit features ACT's mostSilver 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.