This is not a rebuild or just a partial replacement - it's 100% brand new and complete! The PGP1 has been designed from scratch to strengthen and update the Powerglide pump for your racing applications. Larger pump gears for more low RPM volume and pressure. Extra volume to prevent rocking or backing up when transbrake is applied Stiffer castings with ribs to prevent flexing and pressure loss at high line pressure High strength cast iron for maximum rigidity and minimum distortion at high temperatures Custom, high strength stator support shaft to handle high horse power Extra clamping bolts (7 total) to hold pump halves together at high pressure Redesigned oil pathways to increase flow to converter and cooler High clutch drum bushing pressure feed Factory machined for roller thrust bearingReid Racing Powerglide Front Pump PGP1 Forged Steel Automatic Transmission Pump Bolt-In Stator Stock Spline GM Powerglide Pit Stop USAoffers Reid Racing Powerglide Front Pump PGP1 at low everyday prices. Be sure to check out all of our products from Reid Racing including Reid Racing Automatic Transmission Pumps;Powerglide Service Parts.