Originally Posted by "W4MAC"
How many people are useing spacers? Seems like it would create more manifold vacume at lower RPM, increasing gas mileage on those of us who don't have enuf gear.
Jp Magazine did a dyno test a year or so ago on bolt on mods to improve performance. I can't find the article right now, but to the best of my memory, the only thing the throttle body spacer did was to add a whistling noise to the intake. No performance improvements were noted in either measured hp nor in driveability.
If I was you, I would save my money. There is no substitute for lower gears if you don't have "enuf gear." Gears are the best bang for the buck performance improvement there is.