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Hedman Hedders HTC Coated Headers; 1-3/4 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design 28156 - Main Product View
Hedman Hedders HTC Coated Headers; 1-3/4 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design 28156 - Side View
Hedman Hedders HTC Coated Headers; 1-3/4 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design 28156 - Back View
Hedman Hedders HTC Coated Headers; 1-3/4 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design 28156 - Installation View
Hedman Hedders HTC Coated Headers; 1-3/4 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design 28156 - Additional View 5
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Hedman Hedders HTC Coated Headers; 1-3/4 in. Tube Dia; 3 in. Coll; FULL LENGTH Design 28156 fits 1970-1979 Pontiac Firebird

⚠️ Please verify fitment before purchasing. Check the fitment chart below or use the Year/Make/Model tool to confirm this part fits your vehicle.

⚠️ Verify fitment before purchasing. Check the fitment chart below or click the 3 lines in the top left menu, select Home, then use the Year/Make/Model guide.

Hedman Hedders
28156
In stock
$1,678.78 USD $813.99 USD
$813.99 USD
Hedman Hedders HTC Coated Headers; 1-3/4 in. Tube Dia; 3 in. Coll; FULL LENGTH Design 28156 fits 1970-1979 Pontiac Firebird
Description
HTC Coated Headers; 1-3/4 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design


Specifications:

Description_DEF [B@4dfd9a55
Description_DES [B@52aab404
Description_EXT [B@47163304
Description_FAB [B@375f86ca
Description_FAB [B@16518d46
Description_FAB [B@11dc011c
Description_FAB [B@67249e30
Description_FAB [B@2c062dc8
Description_FAB [B@3627aeb3
Description_INV [B@47029d8a
Description_SHO [B@4944e44
Title HEDMAN HEDDERS HTC COATED HEADERS; 1-3/4 IN. TUBE DIA.; 3 IN. COLL.; FULL LENGTH DESIGN
Cylinder Head Port Shape Oval
Cylinder Head Stock Profile Heads
Header Construction MILD STEEL- Standard-Duty
Replacement Gasket 27600
Replacement Head Flange Gasket 27600
California Proposition 65 WARNING: Cancer & Reproductive Harm. For more info visit www.P65Warnings.ca.gov
with EGR No
Variations 28150
Tube Style Long Tubes
Air Conditioning Yes
Automatic Transmission - Column No
Automatic Transmission - Floor Yes
Manual Transmission - Column Yes
Manual Transmission - Floor Yes
Tube Size 1-3/4 in.
Material Mild Steel
Tube Design Standard
Tube Length Long Tubes
Tube Material Thickness 16g
Tube Diameter 1-3/4 in.
Y-Pipe Included No
Weld-Up No
Tuned No
Bolts/Studs Included Yes
Catalytic Converter(s) Included No
Crossover Pipe Included No
Gasket Or Seal Included Yes
Header Fasteners Included Yes
Installation Hardware Included Yes
Motor Mounts Included No
Mounting Hardware Included Yes
Reducers Included Yes
Quantity Sold as a pair.
with A.I.R. System No
Primary Tube Gauge 16g
Primary Tube Diameter (in) 1.75 in.
Package Contents Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware
Header Material Mild Steel
Header Finish HTC Polished Silver Ceramic-Metallic
Flange Thickness 0.3125 in.
Exhaust System Dia 2-1/2 in.
Reducer Outlet Size 2-1/2 in.
Collector Attachment 3 in.
Collector Diameter 3 in.
Collector Size 3 in.
Notes 70-81 Trans-Am 326-455
Collector Style BALL and SOCKET Style (Gasketless)
Emissions Notes EO# D167-27 (click here for covered vehicles in document on ARB.CA.GOV website)
Contents headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware
Finish HTC Polished Silver Ceramic-Metallic
Finish Type HTC SILVER (polished) Ceramic-metallic Coating
Header Style Long Tube
Flange Style Standard
E.O. # Yes
Power Steering Yes


This Part Fits:

Year Make Model Submodel Notes
1970 Pontiac Firebird BASE Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.; Footnotes: (23) Some heads require drilling and tapping of end holes.; Footnotes: (1) Without smog injection or injection heads.; Footnotes: Not For Ram Air III or IV style heads.; Manual Transmission - Floor: Yes; Manual Transmission - Column: Yes; Auto Transmission - Floor: Yes; Auto Transmission - Column: No; Power Steering: Yes; Air Conditioning: Yes
1971 Pontiac Firebird BASE Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.; Footnotes: (23) Some heads require drilling and tapping of end holes.; Footnotes: (1) Without smog injection or injection heads.; Footnotes: Not For Ram Air III or IV style heads.; Manual Transmission - Floor: Yes; Manual Transmission - Column: Yes; Auto Transmission - Floor: Yes; Auto Transmission - Column: No; Power Steering: Yes; Air Conditioning: Yes
1972 Pontiac Firebird BASE Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.; Footnotes: (23) Some heads require drilling and tapping of end holes.; Footnotes: (1) Without smog injection or injection heads.; Footnotes: Not For Ram Air III or IV style heads.; Manual Transmission - Floor: Yes; Manual Transmission - Column: Yes; Auto Transmission - Floor: Yes; Auto Transmission - Column: No; Power Steering: Yes; Air Conditioning: Yes
1973 Pontiac Firebird BASE Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.; Footnotes: (23) Some heads require drilling and tapping of end holes.; Footnotes: (1) Without smog injection or injection heads.; Footnotes: Not For Ram Air III or IV style heads.; Manual Transmission - Floor: Yes; Manual Transmission - Column: Yes; Auto Transmission - Floor: Yes; Auto Transmission - Column: No; Power Steering: Yes; Air Conditioning: Yes
1974 Pontiac Firebird BASE Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.; Footnotes: (23) Some heads require drilling and tapping of end holes.; Footnotes: (1) Without smog injection or injection heads.; Footnotes: Not For Ram Air III or IV style heads.; Manual Transmission - Floor: Yes; Manual Transmission - Column: Yes; Auto Transmission - Floor: Yes; Auto Transmission - Column: No; Power Steering: Yes; Air Conditioning: Yes
1975 Pontiac Firebird BASE Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.; Footnotes: (23) Some heads require drilling and tapping of end holes.; Footnotes: (1) Without smog injection or injection heads.; Footnotes: Not For Ram Air III or IV style heads.; Manual Transmission - Floor: Yes; Manual Transmission - Column: Yes; Auto Transmission - Floor: Yes; Auto Transmission - Column: No; Power Steering: Yes; Air Conditioning: Yes
1976 Pontiac Firebird BASE Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.; Footnotes: (23) Some heads require drilling and tapping of end holes.; Footnotes: (1) Without smog injection or injection heads.; Footnotes: Not For Ram Air III or IV style heads.; Manual Transmission - Floor: Yes; Manual Transmission - Column: Yes; Auto Transmission - Floor: Yes; Auto Transmission - Column: No; Power Steering: Yes; Air Conditioning: Yes
1977 Pontiac Firebird BASE Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.; Footnotes: (23) Some heads require drilling and tapping of end holes.; Footnotes: (1) Without smog injection or injection heads.; Footnotes: Not For Ram Air III or IV style heads.; Manual Transmission - Floor: Yes; Manual Transmission - Column: Yes; Auto Transmission - Floor: Yes; Auto Transmission - Column: No; Power Steering: Yes; Air Conditioning: Yes
1978 Pontiac Firebird BASE Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.; Footnotes: (23) Some heads require drilling and tapping of end holes.; Footnotes: (1) Without smog injection or injection heads.; Footnotes: Not For Ram Air III or IV style heads.; Manual Transmission - Floor: Yes; Manual Transmission - Column: Yes; Auto Transmission - Floor: Yes; Auto Transmission - Column: No; Power Steering: Yes; Air Conditioning: Yes
1979 Pontiac Firebird BASE Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.; Footnotes: (23) Some heads require drilling and tapping of end holes.; Footnotes: (1) Without smog injection or injection heads.; Footnotes: Not For Ram Air III or IV style heads.; Manual Transmission - Floor: Yes; Manual Transmission - Column: Yes; Auto Transmission - Floor: Yes; Auto Transmission - Column: No; Power Steering: Yes; Air Conditioning: Yes
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