Brake Proportioning Valve
Adjustable
​Black
910-31355
Allows easy adjustment of front to rear brake bias.

Universal design works on all race cars.
100 to 1500 psi range, up to 57% pressure reduction.
Uses 1/8" NPT fittings.

Compensates for weight transfer to the front wheels during braking.
All factory brake systems allow for this in some fashion.
An APV allows you to "fine tune" a street or race brake system (which normally uses components
from a variety of sources) and thus prevents severe rear brake lockup under moderate-to-heavy braking.