Discharge nozzle screw - Hollow - 121-7 frostbite 1-Chamber Internal Design Cancels out

1-Chamber Internal Design Cancels out Annoying High Pitch Frequencies

OEM - 52009913AB

These mufflers utilize the same patented Delta Flow® technology that is found in Flowmaster's other Super series mufflers to deliver maximum performance

1971 - 1974 Chevrolet Impala

oil filter stud

Discharge nozzle screw - Hollow - 121-7 frostbite 1-Chamber Internal Design Cancels outOverview: Designed for nozzle size . 040 & up Features: Genuine Holley Quality Parts Application: Year Make Model Submodel Engine Size Universal Specs: Brand Holley Color Silver Emission Code 5 Material Steel Product Type Nozzle Screws Warranty Limited 90 Day