aFe Throttle Body Spacer BMW 135i 335i 535i (N54) Honda Dyno testing showed maximum gains

Dyno testing showed maximum gains for the 2015+ WRX of up to 33 whp and 30 wtq and peak gains of up to 28 whp and 21 wtq while maintaining safe AFRs on the stock tune

12" Blue Fan # MMFAN-12BL

polished tips

Not suggested for any street driven 370Z/G37

aFe Throttle Body Spacer BMW 135i 335i 535i (N54) Honda Dyno testing showed maximum gainsaFe Silver Bullet throttle body spacers for the 135 355 create turbulence in the air flow at the point just prior to 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