I need new headers

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StevesK10

Junior Member
Joined
Mar 29, 2023
Posts
1
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Location
Lafayette, CA
First Name
Steve
Truck Year
1977
Truck Model
K10 Cheyenne
Engine Size
400cu.in.
Seeking help buying new headers. This is for my 1977K10 400cu.in. Cheyenne. I have been running Doug Thorley Tri-Y long tube headers for 20+/- years. They are now past their useful life. Living in CA the truck still has to pass smog every 2 years. The truck came equipped with the A.I.R. Injection system so the headers need to accommodate the fresh air injection tubes. Hedman is the only mfg. I can find that makes smog legal headers for my truck. Am I missing other options? What experience does anyone have with Hedman. Thank you.
 

Finkaire

Finkaire
Joined
Dec 28, 2021
Posts
443
Reaction score
715
Location
California
First Name
Loren
Truck Year
1984
Truck Model
Silverado c10
Engine Size
305
Headman has a good reputation. Being in California modifications are extremely limited. I like the stock manifolds, quiet and you don’t have to end wrench the plugs out.
 

SquareRoot

Full Access Member
Joined
Mar 18, 2017
Posts
3,659
Reaction score
6,602
Location
Arizona
First Name
Mike
Truck Year
85
Truck Model
K20
Engine Size
350

I'll never, ever waste time with headers on a street driven vehicle again.
 

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