Lt1 headers?

Discussion in 'High Tech Retrofits' started by Spot_remover, Aug 19, 2009.

  1. Spot_remover

    Spot_remover Veteran Member Gold Member

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    What headers are you guys using for LT1s or will regular SBC headers work? Of coarse i mean what headers will fit well in our 2nd gens with LT1s
     
  2. sbca96

    sbca96 Veteran Member

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    The LT1 has a D port exhaust, so regular SBC headers will not work. That is
    what I know, to add to the above question, are there any California smog legal
    exhaust headers that fit an LT1 in a 2 gen? (pipe dream huh?)

    Tom
     
  3. Ca-ma-ro

    Ca-ma-ro Member Lifetime Gold Member

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    I used Hedman Hedders pn:65104 for a SBC in a Camaro with 1 3/4" primaries and 3" collector. They did not fit perfectly, I had to modify the angle of the flange on the driver's side to clear the steering shaft and lower control arm bracket. I ground the flange off the headers, rolled the header in toward the motor, tacked them, and then did a final weld on the gasket side. Although you could just dent it a little for clearance, I didn't want dents in my headers, so I did it the "hard" way.

    BEFORE: In the first pic, the header is not tightened because it would contact the steering shaft, the second pic shows it contacting the control arm bracket.

    [​IMG]
    [​IMG]

    AFTER: Shows about 1/4" of clearance at the steering shaft and clears the control arm bracket by about 3/8" fully tightened.

    [​IMG]

    If you'd like a more detailed explanation of what I did, let me know.

    BTW: The passenger side fit with no modifications. And once installed, both tucked up nicely beneath the car, so speed bumps shouldn't be TOO big a problem...
     
    Last edited: Aug 19, 2009
  4. Spot_remover

    Spot_remover Veteran Member Gold Member

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    Wonder if a set of block huggers for a 4th gen, would fit with no further modifications?
     
  5. Ca-ma-ro

    Ca-ma-ro Member Lifetime Gold Member

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    I've heard the shorties are better for clearance, but can't comment on that since I wanted long tube from the get-go...
     
  6. 91chevywt

    91chevywt Veteran Member

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    Small block chevy headers fit. I'm running them. I haven't had the car on the dyno but it does run like a raped ape. I'd imagine any header will perform better than the stock exhaust manifolds. Plus they will fit nicely.
     
  7. 77LT1

    77LT1 Veteran Member Lifetime Gold Member

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    I'm using my old Hedmans I had on my car with the Gen I 350 I use to have. No issues at all and if it fit before it should fit after it's still a small block Chevy after all.

    B
     
  8. LT1 WS6

    LT1 WS6 Veteran Member

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    The headers just need to be 1-3/4" primary to guarantee they'll cover the exhaust ports. As mentioned, the LT1 has a D port for the exhaust. There may be some 1-5/8" primary non D port headers that will work but I don't know of any.
     
  9. 3_z28camaro

    3_z28camaro Veteran Member Lifetime Gold Member

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  10. Desert_Dick72SS

    Desert_Dick72SS Veteran Member

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    I used Hedman #66609 (same as 68609?)
    These are coated shorty headers,1-5/8", coated, but they are specifically for D-Port small block angle-plug in 67-81 camaro.
    They fit perfectly and have lots of ground clearance, but would interfere with clutch linkage if you have a stick (unless you went to a hydraulic)
    I have a ZZ383 with Fastburn Heads, D-port like the LT-1, in my '72.

    $459 at Summit:
    http://www.summitracing.com/parts/HED-66609/

    -Rich-
     
    Last edited: Aug 21, 2009

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