aFe Throttle Body Spacer BMW 135i 335i 535i (N54) Honda The smooth curves and increased

The smooth curves and increased diameter of this header helps remove restriction and keeps exhaust gas flowing smoothly for improved performance and durability

Not suggested for any street driven 370Z/G37

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

Improved heat and pressure tolerance compared to the stock rubber components

Subaru Legacy GT 5-Speed (2007-2009) & Legacy GT 6-Speed (2010-2012)

aFe Throttle Body Spacer BMW 135i 335i 535i (N54) Honda The smooth curves and increasedaFe 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