Re: Do throttle body spacers really work?
Most spacers are a waste of money. On a carbureted motor, the spacers helped to mix the air and fuel which did show an increase in power. On a fuel injected motor, the fuel enters in the manifold behind the TB, so all the spacer does is swirl the air around by itself which makes a loud whistling noise without making any more power. I would go with a true ported throttle body instead of running a spacer.