Chevy GM LS3 Downdraft Idle Air Control Intake Adapter Aluminum 1-148-002 Increase your horsepower and torque

Increase your horsepower and torque for your ride--just bolt on these Speedmaster headers

Speedmaster gilmer drive-style crankshaft pulley spacers are specifically designed to help achieve proper belt alignment

Speedmaster cast iron brake calipers include calipers

These Speedmaster air filter bases are just what you need to build that custom air cleaner assembly

Kit includes adapter plate to permit use of certain square bore style carburetors

Chevy GM LS3 Downdraft Idle Air Control Intake Adapter Aluminum 1-148-002 Increase your horsepower and torqueThese idle air control motor adapters are designed to adapt the GM style idle air control motor to a our Speedmaster downdraft system. They will facilitate the installation and use of the FAST XFI or other EFI street or competition systems. They are manufactured from aluminum and have a natural finish.