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All QualCast part numbers begin with a 2-digit prefix which determines the part type, as detailed below:

10- Valve
12- Racing Valve*
20- Seat For Cast Iron Head
21- Seat For Aluminum Head
22- Seat, Factory Installed (Exact O.D.)
25- Seat In Powdered Metal Material
30- Cast Iron Guide
31- Manganese-Bronze Guide
32- Spring
33- Valve Spring Insert
34- Keeper
36- Lifter
37- Rotator or Retainer
38- Valve Stem Seal
40- Rocker Components
50- High Performance Valve*
51- Sport Compact High Performance Valve*
52- High Performance Spring*
53- Street Performance Valve*
55- High Performance Retainer*
58- High Performance Water Pump*
59- High Performance Oil Pump*
87- Injector Components
90- New Water Pump
96- Bulk Expansion Plug
97- Expansion Plug Kit
*In QualFast performance catalog

QualCast Interchange

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