CUSTOM THROTTLE BODY KITS ( ITB's )….. LINKAGE, FUEL AND AIR PARTS, EMS KIT: > Air Filter / Horns   Air Horns. Air Horns. $ 22.95               More Information Custom 4 Cylinder Plenum. Custom 4 cylinder Plenum Complete. $ 975.00               More Information      Quantity:     Filter- Foam, 3''. Filter, Foam, 3" $ 18.95               More Information      Quantity:     Vacuum canister Plugs: Vacuum Plug for ITB's or Vacuum Logs. $ 2.25               More Information      Quantity:     Vacuum Nipples: Fits ITB and Vacuum Log Vacuum Nipple: Fits ITB and Vacuum Log, for 1/8" Vacuum Line. $ 2.95               More Information      Quantity:     ''Billet'' - Velocity Stacks: Velocity Stacks. $ 65.00               More Information ''Billet'' Velocity Stacks ( 4 cyl. ) Billet Velocity, 4 Cylinder. $ 255.00               More Information      Quantity: