Throttle body spacers tend to
draw quite a bit of controversy.
The "Will They Work??? Or Won't They" debate continues although
numerous studies have shown that throttle
body spacers have given significant gains in
performance, horsepower, torque and fuel economy especially on
vehicles using Throttle Body Injection or the standard four-barrel
The throttle body spacer adds
velocity by effectively improving the vacuum response to the
TBI or carburetor. The throttle body
spacer, effectively increases the runner length of the
intake manifold while at the same time increasing the overall
This, in turn, also acts to prevent any of the air-fuel mixture
from hitting the bottom of the intake manifold and bouncing back up
to scatter in the intake manifold increasing overall performance
and throttle response.