Billet Brake Booster Valve 

Part number: AF350-00 to AF350-01

Available in Black & Polished

21mm 13/16" hole.  Has a built in one way valve.

To suit 3/8" barb or -6AN fitting

Most booster valves are made in a white plastic that just don't match your engine bay when you have braided hoses and fittings. Aeroflow's billet booster valves give your engine bay that clean look.