Product details:

Standard and Low-Profile vacuum generator models combine a vacuum tank and S-series Vacuum pump-all to save space and simplify installation. The Low-Profile Vacuum Generator stands less than 8 inches (203mm) high for even greater application versatility. All S-series and T-series pumps are now converted to the new W motor. When using the W motor as a replacement for older motors, the bellows must be replaced. If a new W motor is with the older bellows design, the diameter of the old bellows plays a big factor in producing a pump knocking noise. To avoid this, it is necessary to use the complete W motor kit for all S and Q motor replacements. The new whisper W motor kit includes: a W motor, eccentric, o-rings, shoulder bolt, bellows and two bellows clamps. The W motor kit numbers are: 12-volt: 385311423 24-volt: 385311424