The cooler plenum and throttle body will also help keep the power level stay more consistent. Most cars feel slightly sluggish on very hot days, or after a time of stop-and-go driving. This is in part because of the intake air temperature rising. These spacers will help stop this power loss. IN certain applications, these spacers also add volume to your plenum, or smooth out the path to the cylinders, which will help increase torque throughout the powerband.

Spacers are great bang-for-the-buck, proven performance item, especially on an already modified vehicle; while not having any negative side effects like lower gas mileage. Many spacers sold are a fiber phenolic. But all of Cheetah spacers are made from Garolite, which has equivalent insulation properties to normal Phenolic, but is more moisture resistant. This is preferred, since an engine bay can have many different climates, with varying humidity's. Many vehicles also run EGR and PCV vapors back through the intake, and Garolite stands up to this harsh environment; as it is also more chemically resistant. In addition, with a wet nitrous kit, extra injectors, or a water injection kit, there may be considerable amount of fluid in the intake.