12 volt Electric vacuum pump for brake boosters If you have an engine that does not produce at least 15" of vacuum at idle , then your brake pedal could be hard and you have no brakes... This pump will solve your problem. 2 year Warranty increases idle vacuum up to 26" pedal booster comes up and improves stopping power new compact design for easier installation Comes with 6 feet of vacuum hose and clamps Improves all other vacuum accessories that run on vacuum, heater and A/C controls No special instructions required Professional installation not required