These handy adapters bolt to front of the popular Bosch 74mm and 82mm Electronic Throttle Body (AF64-2135, AF64-2136) and allows an Aeroflow intercooler clamp (AF25-3000 and AF25-3500 sold separately) to be used. The internal bore of the adapter has been designed to ensure a smooth transition to the throttle body for maximum flow. Featuring an O-ring on each side of the adapter to ensure a positive seal onto the throttle body and the intercooler clamp. Machined from billet 6061-T6 aluminum and anodized in a Black or Silver finish.