After putting ITB's in my car, I noticed intermittent loss of braking power, especially after releasing gas pedal and abruptly applying brakes...(while autocrossing)...due to loss of vacuum in the intake manifold that supposedly powers my brake booster. Anyway, the cheapest pump I found cost $279 from summitracing. Anyone here knows a place that sells em cheaper? Any brand recommendations?

 

G.M. makes them and I think they were on some of the older Cad's. Try talking to one of the tech's at your local Cad dealer.

They are also used on R.V.'s and you should talk to an RV repair tech.

As you already know, Summit sells them for the street-rod guys.

Wes