It's been a secret in racing for years: Spacer plates under the carburetor will increase intake manifold plenum volume and power.
POWERAID of Scottsdale, Arizona, has applied the same power principal for today's throttle-body motors and literally added its own twist.
POWERAID's throttle-body spacers feature a unique Helix Bore design that enhances mid-range power and torque while improving throttle response.
The patented Helix Bore threads on the nside of the spacer cause the incoming air charge to tumble, or spin, for better atomization of the mixture downstream in the combustion chamber, according to POWERAID.
Installation on TBI trucks is easy, since the kit comes complete with new throttle-body bolts, gaskets, and full instructions. The following photos highlight a typical TBI install.