Coolant Overflow Tank/Reservoir

Dorman 54002 Dorman Coolant Reservoirs | Summit Racing - Free Shipping on Orders Over $99 at Summit Racing

The #54002 is much cheaper than the #54003

Anyone know what is the difference?

Engine Coolant Recovery Kit | 54003 | Engine Coolant Recovery Kit | Dorman Products

Engine Coolant Recovery Kit | 54002 | Engine Coolant Recovery Kit | Dorman Products