GM Universal 7" Single Diaphragm Power Brake Booster Chrome
This is a brand new 7" Chrome SINGLE brake booster.
A 7" booster is ideal for most small to mid size street rods and customs.
Mounts with a 4-bolt pattern 3-3/8'' bolt spacing
The booster requires 18" of vacuum to operate properly.
With this vacuum level the booster will produce a maximum pressure output of 950 psi with a 1" bore master cylinder.
This pressure level works well for four wheel drum systems and disc/drum vehicles.