Out of stock Compare Quick view HOLLEY Secondary Diaphragm Housing Cover HOLLEY MSRP: Now: $106.95 Was: HOLLEY HLY20-28 Secondary Diaphram Housing CoverDiaphragm Cover - Secondary - Aluminum - Chromate - Holley 4160 Carburetors - Pair MSRP: Now: $106.95 Was: Out of stock Compare Quick view Qty in Cart: 0 Price: MSRP: Now: $106.95 Was: Subtotal: Out of stock