Thrush Thrush Glasspack Muffler - 2-1/4 in Center Inlet - 2-1/4 in Center Outlet - 20 x 3-1/2 in Round Body - 25 in Long - Red Powder Coat - Universal Water Temp Sending Unit OEM 12- or 16-bolt heads

OEM 12- or 16-bolt heads or equivalent

On-board diagnostic LEDS - ECU power

1970-1974 Pontiac FirebirdProduct Description:

1-1/4 in to 2-1/8 in Adjustable

Retard Timing In Three Stages

Thrush Thrush Glasspack Muffler - 2-1/4 in Center Inlet - 2-1/4 in Center Outlet - 20 x 3-1/2 in Round Body - 25 in Long - Red Powder Coat - Universal Water Temp Sending Unit OEM 12- or 16-bolt headsThrush Glasspack Muffler 24201 Single Outlet Overall Length 25 in. Shell Length 20 in. Inlet 2. 25 in. Outlet 2. 25 in. Tube Diameter 2 in. Body Diameter 3. 5 in. Heavy Gauge Shell Provides Maximum Durability Expandable Bushings For Custom Applications Perforated Center Tube Minimizes Turbulence CRF For Powerful Tone and Long Life Straight Through Design For Max. Flow and Power Thrush products have been a staple of hot rodders for over 40 years as