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    Pros/Cons of headers?

    Hey Everyone-
    I was throwing the idea around of putting headers on my 94 5.7L Sierra. What are the pros and cons of doing this? I'd have to use emissions legal ceramic coated ones to appease the smog police and make it aesthetically pleasing. Also what kind of power gains could I expect? Thanks for your help
    Matt Dwyer
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    Get in sit down hang on. SolMan98's Avatar
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    you will get a lot of difference and the same answers on this (confused yet LOL)

    couple of weeks ago i installed some stainless shorties, installation went great, we heated them up and cooled down several times and retorqed several times. we later retorqed again and they were still tight. if they are designed for the vehicle they will be emission legal. ceramic or stainless is the only way to go for longevity. sound did not change much, power on the bottom end had definately increased, haven't refueled yet, but it seems my mileage will increase (will keep an eye on that benefit)

    so for MY personal opinion, headers are worth it.

    D/D-2006 HHR 1LT 5-Speed.
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    Home of the Snooki punch! CKTA's Avatar
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    I agree.
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    Headers =

    Pros:
    Performance
    Look
    Exhaust sound

    Cons:
    Little bit louder engine bay (I like my engines quiet, exhaust loud)
    Frequent bolt tension checks. If you don't tighten your bolts every so often, they will more than likely loosen up a bit and you will run the risk of blowing through a gasket.

    EFI University's EFILive Course Instructor, Black Bear Performance
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    OK Thanks for the opinions, who makes good coated or stainless ones? Thanks again
    Matt Dwyer
    FOR SALE:
    1994 GMC Sierra, raised from 4"/6" drop, Flowmaster 3" pipes, Satellite Radio...

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    Originally posted by GMCMD23
    OK Thanks for the opinions, who makes good coated or stainless ones? Thanks again
    For a 94... Gibson!

    Then get them Jet Hot Coated.

    EFI University's EFILive Course Instructor, Black Bear Performance
    2003 Silverado SS. Radix. LS6 Cam || 2002 Trans Am WS6. Quasi-For Sale || 2008 Trailblazer SS

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    Home of the Snooki punch! CKTA's Avatar
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    Originally posted by justin
    For a 94... Gibson!

    Then get them Jet Hot Coated.
    I agree again.
    2016 Carlisle All Truck Nats info..
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    Get in sit down hang on. SolMan98's Avatar
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    Originally posted by CKTA
    I agree.
    Originally posted by CKTA
    I agree again.

    anyone see pattern here

    D/D-2006 HHR 1LT 5-Speed.
    1996 Silverado, 5.7, FIPKII, Elect Fans, S/S Headers, Duals, Wait4Me, 4/5 drop on 18" Weld Evo Velosity's. STOLEN ON 9/9/2006

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    Preferred Vendor justin's Avatar
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    Originally posted by 1996Silverado
    anyone see pattern here
    I Agree! :crazy:

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    Haha you guys rock, thanks a lot
    Matt Dwyer
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    1994 GMC Sierra, raised from 4"/6" drop, Flowmaster 3" pipes, Satellite Radio...

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    Re: Pros/Cons of headers?

    Originally posted by GMCMD23
    Hey Everyone-
    I was throwing the idea around of putting headers on my 94 5.7L Sierra. What are the pros and cons of doing this? I'd have to use emissions legal ceramic coated ones to appease the smog police and make it aesthetically pleasing. Also what kind of power gains could I expect? Thanks for your help
    Least not forget that they will raise underhood temps (whether ceramic coated or SS) because of the much greater surface area that the hot gasses are exposed to (one of the main reasons they are not stock on trucks and SUV's) Make sur you have "extra" air flow to keep underhood temps down, especailly on a hot day in traffic.

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    Yeah underhood temps are always a concern. If I were to put headers on my truck I'd definitely use a header wrap to help keep them down.
    Matt Dwyer
    FOR SALE:
    1994 GMC Sierra, raised from 4"/6" drop, Flowmaster 3" pipes, Satellite Radio...

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    Originally posted by GMCMD23
    Yeah underhood temps are always a concern. If I were to put headers on my truck I'd definitely use a header wrap to help keep them down.
    That would help as they can "bake" a engine compartment if it is tight with little airflow.

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    Least not forget that they will raise underhood temps

    Hmmm. So OEM cast iron exhaust manifolds don't? If I remember correctly, manifolds are thicker and denser than headers. Which means that manifolds absorb more heat. Therefore they retain heat more than headers. In conclusion headers do not raise the underhood temp anymore than manifolds. Headers DO NOT retain heat like manifolds do. They keep the under hood temps lower.
    1991 C1500 Ext. Scrapped. I still have the engine, tranny and Detroit tru-trac.
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    Originally posted by TITANIUM

    Hmmm. So OEM cast iron exhaust manifolds don't? If I remember correctly, manifolds are thicker and denser than headers. Which means that manifolds absorb more heat. Therefore they retain heat more than headers. In conclusion headers do not raise the underhood temp anymore than manifolds. Headers DO NOT retain heat like manifolds do. They keep the under hood temps lower.
    and cool off a lot faster

    D/D-2006 HHR 1LT 5-Speed.
    1996 Silverado, 5.7, FIPKII, Elect Fans, S/S Headers, Duals, Wait4Me, 4/5 drop on 18" Weld Evo Velosity's. STOLEN ON 9/9/2006

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    If you have the headers coated w/ Jet Hot it will reduce underhood temps. I can grab my headers 15 minutes after driving! :read:
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    Also, header wrap will accelerate corrosion because it traps moisture against the header. Probably not a problem with stainless, but even ceramic coat will corrode, unless the entire header, inside and out, is cermaic coated. Many manufacturers will void corrosion warranties if header wrap is used.

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    Ok Long tube or shorties?

    I've heard you can gain low end with the shortys and lose low end with the long tubes but the gain up top with the long tubes is worth the trade.
    95 1500 4X4 5.7

    Duals, TBI custom chip, TBI spacer, Injector spacer,March Pulleys

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    Get in sit down hang on. SolMan98's Avatar
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    Originally posted by Southern Mudder
    Ok Long tube or shorties?

    I've heard you can gain low end with the shortys and lose low end with the long tubes but the gain up top with the long tubes is worth the trade.
    well lets just go off that theory, what RPM range are you usually in?

    D/D-2006 HHR 1LT 5-Speed.
    1996 Silverado, 5.7, FIPKII, Elect Fans, S/S Headers, Duals, Wait4Me, 4/5 drop on 18" Weld Evo Velosity's. STOLEN ON 9/9/2006

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    I'd go short because low end power is what would benefit me the most. idle-3500
    Matt Dwyer
    FOR SALE:
    1994 GMC Sierra, raised from 4"/6" drop, Flowmaster 3" pipes, Satellite Radio...

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