The Peterson R4, 3 or 4 Stage Drag, Dry Sump Pump features 1.4" thick rotors in all scavenge stages to get maximum vacuum and horsepower. It can be had with 1.2" standard or 1.4" high volume thick pressure rotors to fit all engine oiling needs. Mounting tabs can be mounted to one of our engine mounts or be used to create a custom mount. Available with a rear drive to mount a hex drive fuel pump.
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