Hedman 28150 Pontiac Firebird 350-455 CID Long Tube Street Headers

Installation Kit Included

Hedman - Made in the USA


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2 in stock

Hedman 28150
Street Headers

Long Tube Type
NOTE: The paint applied to these headers is a temporary coating only and is designed to burn off during use. High temperature paint or other high temperature coatings are recommended.

Pontiac Firebird

350-455 CID


Tube Diameter 1-3/4 in.
Tube Style Long Tubes
Collector Style BALL and SOCKET Style (Gasketless)
Air Conditioning Yes
Automatic Transmission - Column No
Automatic Transmission - Floor Yes
Manual Transmission - Column Yes
Manual Transmission - Floor Yes
Collector Attachment 3 in.
Collector Diameter 3 in.
Collector Size 3 in.
Reducer Outlet Size 2-1/2 in.
Exhaust System Diameter 2-1/2 in.
Contents headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware
E.O. # Yes
Emissions Notes EO# D167-27 (click here for covered vehicles in document on ARB.CA.GOV website)
Finish Uncoated
Finish Type UNCOATED Mild Steel! Shipped with Temporary Paint.
Flange Style Standard
Flange Thickness 0.3125 in.
Header Style Long Tube
Notes 70-81 Trans-Am 326-455
Power Steering Yes
Material Mild Steel
Tube Design Standard
Tube Length Long Tubes
Tube Material Thickness 16g
Tube Size 1-3/4 in.
Variations 28156
With A.I.R. System No
With EGR 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
Y-Pipe Included No
Quantity Sold as a pair.
Primary Tube Gauge 16g
Primary Tube Diameter 1.75 in.
Package Contents Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware
Header Material Mild Steel
Header Finish Uncoated
Cylinder Head Port Shape Oval
Cylinder Head Stock Profile Heads
Header Construction MILD STEEL- Standard-Duty
Replacement Gasket 27600
Replacement Head Flange Gasket 27600


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