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Thread: Headers

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  1. #1

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    can anyone suggest a good set of headers and a good place to order them. also i want shorties with high-flow cats i have a 2010 4.8l 2wd

  2. #2

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    Quote Originally Posted by keegan View Post
    can anyone suggest a good set of headers and a good place to order them. also i want shorties with high-flow cats i have a 2010 4.8l 2wd

    Summitt Racing carries.....Just about Every Header on the Market Today.....Some of the Ones to look at would be....Pacesetter......JBA....Gibson....Edelbrock.. ..to name a few......If all you want are Shortly Headers......Save your Money and buy a Set of Long Tube Headers......With Shortly's the Gains are Small if any.....Long Tube Headers will give you your Best Gains.....with H.P. and M.P.G.


    Last edited by 99'HEARTBEAT; 01-02-2011 at 08:46 PM.

    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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    do long tube headers reduce torque and eliminate your cats?

  4. #4

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    x2 on heartbeat I'm going to go with gibsons when the money tree grows. as far as I know of long tube headers are really just better for everything and they don't eliminate your cats... those two bubble like things you can see from the hood on your chevy are just big baffles.

  5. #5

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    i was always told that short tube headers are better for low to mid range tq and hp which our case because our engines dont rev that high plus i dont plan on going to far into performance with this truck its all just for fun lets face it gas mileage sucks! i only drive it on the weekends

  6. #6
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    Quote Originally Posted by keegan View Post
    do long tube headers reduce torque and eliminate your cats?
    No,,, long tube headers don't reduce torque, they actually produce torque & more of it, lower in the RPM range where you need it than shortys do. Most people never run their street trucks up in the RPM range where shortys might benefit them. Shorty headers are just like throwing your money away like Mike & Sandwich said. The only good thing about shorty headers is that you can tell your friends "hey I got headers" lol
    Stay with 1 1/2' or 1 5/8" diameter primary tubes too. Anything larger is going to hurt you in the lower RPM ranges.
    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


  7. #7

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    thanks for the info but if the the long tubes eliminate the cats im pretty sure i wont pass maryland emissions also do u have to re-locate O2 sensor

  8. #8
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    They don't eliminate the cats (unless you want to) & there are bungs welded in the headers for your O2 sensors
    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


  9. #9

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    No you still have to run cats with the headers. Not sure is the factory cats will bolt or weld up so you may have to buy universal cats. Most states will not allow you to eliminate equipment meant for emissions on vehicles. A good set of headers has the port for an O2 sensor. When you have the exhaust done some kits have the ports for aft cat O2's otherwise the exhaust shop could drill a hole and weld a nut for the sensor to screw. Personally I wouldn't eliminate the cats on newer vehicles because they help the computer keep put engines efficient. Now an old carb big block=no cats!

    2000 GMC Sierra 1500 Z71
    Stock 5.3L
    High Flow Filter
    Dual Exhaust
    KC Driving Lights behind Grille
    2011 17" GMC takeoffs
    Nerf Bars
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