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  1. #1

    Default 1500 4.8 headers

    I was thinking about getting some headers for my truck its a 07 silverado 4.8liter. Should i go with the long tube or the shorty style? As far as the y pipe should i delete the cats except one due to state inspections, or get all of them replace with the high flow ones?

  2. #2

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    Quote Originally Posted by wheels321 View Post
    I was thinking about getting some headers for my truck its a 07 silverado 4.8liter. Should i go with the long tube or the shorty style? As far as the y pipe should i delete the cats except one due to state inspections, or get all of them replace with the high flow ones?
    Shortly Headers, for the most part are a Direct Bolt-on....But will only give you Small Gains.....For Better Gains in Performance .....Long Tube Headers would be the way to go.....along with the Y-Pipe...but the down side is your Exhaust will need to be Re-Worked......As far as Deleting your Cats.....that's your Call......and Today's Factory Cats Flow Much Better than Most think they Do......Again your Call.
    Last edited by 99'HEARTBEAT; 02-17-2011 at 09:42 PM. Reason: Added Infor.

    MIKE


    99"SILVERADO
    5.3 l 3.73 l G80
    BLACK BEAR CUSTOM TUNE
    SNUGTOP l COLORMATCH l KATZKIN










  3. #3
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    Default

    X2 on Mikes post. Go with the long tubes or you're just wasting your money. Don't get primary tube diameters larger than 1 5/8" inches or it will move your peak torque too high in your RPM range. 1 1/2" diameter primaries would be even better.
    As far as deleteing one cat & keeping one to pass your DEQ inspection...That won't work. The state inspectors know exactly how many cats your truck came with, & they do a visual inspection of everything, & they will fail you for this.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


  4. #4

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    i read an article in truckin- they dynoed before and after a magnaflow cat install and it gained 10hp
    2008 TAHOE LT, volant powercore, superchips programmer

  5. #5

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    Welcome to the club. X3 what Mike said about long tubes. I like Dynatechs and AmericanRacingHeaders.

  6. #6

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    Thanks for all the help. Probably going to go with the long tubes. Not sure what brand I am going to go with yet. I will probably either keep the original cats or go with magnaflow since I already have that for my cat back exhaust system.

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