Hedman Performance Group

STREET/STRIP Headers; 70-81 FIREBIRD 400-455; 1-3/4"x1-7/8" Stepped; 3-1/2" Coll

STREET and STRIP Hedders; 70-81 FIREBIRD 400-455; 1-3/4" -1-7/8" Stepped Tubes; 3-1/2" Collector

Part#35146

Product Specifications

Tube Diameter 1-3/4" x 1-7/8"
Tube Style Long Tube
Air Conditioning No
Automatic Transmission - Column No
Automatic Transmission - Floor Yes
Manual Transmission - Column No
Manual Transmission - Floor No
Collector Attachment 3-1/2"
Collector Size 3-1/2"
Contents Pair of Headers, Gaskets & Mounting Hardware
Emissions Notes RACING HEDDER! Not legal for use on pollution controlled vehicles.
Engine Pontiac 400-455
Exhaust Exit Under Chassis Exit
Finish Raw
Flange Style Standard
FLANGE Thickness 0.375"
Head Flange Gasket 18073
Header Port Shape Standard Port
Header Style Long Tube- Stepped
Installation Notes Flange may need to be cut between ports to install hedders. Do not cut between twin ports.
KEY FEATURE Standard Port
Notes 70-81 Firebird 400-455
Power Steering No
Product Info 70-81 PONTIAC FIREBIRD- 13/4", 17/8", 31/2" - HUSLER STEPPED TUBE RACE HEDDERS
Material Mild Steel
Tube Design Stepped Long Tube Race Headers
Tube Length LONG Tubes
Tube Material Thickness 18g
Tube Size 1-3/4" x 1-7/8"
with A.I.R. System No
with EGR No
Weld-Up No
Reducer Outlet Size 2-1/2"
Tuned Yes
Reducers Included Yes
Gasket Or Seal Included Yes
Bolts/Studs Included Yes
Transmission Mount Included No
Motor Mounts Included NO
Crossover Pipe Included NO
Y-Pipe Included No
Catalytic Converter(s) Included No
Quantity Sold as a set.
Primary Tube Gauge 18g
Primary Tube Diameter (in) 1.75" x 1.875"
Package Contents Pair of Headers, Gaskets & Mounting Hardware
Header Material Mild Steel
Header Finish Raw
Gasket # 18073
Cylinder Head Port Shape D-port
Cylinder Head Standard

Vehicle Applications

Pontiac

Firebird

Year

Submodel

C.I.D.

Liter

Cylinders

1981

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1981

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1981

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1980

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1980

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1980

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1979

Formula

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1979

Formula

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1979

Formula

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1978

Formula

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1978

Formula

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1978

Formula

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1977

Base

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1977

Base

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1977

Base

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1976

Base

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1976

Base

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1976

Base

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1975

Base

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1975

Base

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1975

Base

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1974

Base

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1974

Base

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1974

Base

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1973

Base

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1973

Base

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1973

Base

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1972

Base

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1972

Base

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1972

Base

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1971

Base

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1971

Base

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1971

Base

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1970

Base

403

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1970

Base

400

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No

1970

Base

455

Vehicle Specific Information
Air Conditioning	No
Power Steering	No
Auto Transmission - Column	No
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	No