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MAC Headers and ORY

This is a discussion on MAC Headers and ORY within the External Engine forums, part of the LSx Technical Help Section category; Hey guys, just ordered me some HTS Coated MAC mid-tubes w/ the ORY. They advertise 40hp & 40lbs trq. I ...

  1. #1
    Impounded MikeSomething's Avatar
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    Pewter Metallic
    '00 Z/28

    MAC Headers and ORY

    Hey guys, just ordered me some HTS Coated MAC mid-tubes w/ the ORY. They advertise 40hp & 40lbs trq. I really don't think I'm gonna get nearly as much as that. I just thought it was cool that the way the Y pipe goes into the collectors kinda shape it as long tube headers w/ out loosing clearance. Anyone have em? Thoughts?

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    Visualize°Design°Create SSwt00SS's Avatar
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    '12 Silver SS 1SS
    '00 Black SS #8617

    just curious why you went w/a 2.5" mid-tube/y-pipe combo and not LT's/3" y-pipe. you will loss some low end TQ w/a 2.5" vs. a 3" combo. I originally bought exactly what you did, but realized my mistake and sold them (i'm not saying yuo made a mistake). the end of the y-pipe to i-pipe is 2.5" not 3", so if you have a 3" cat-back, you will need a filler piece tubing from 2.5" to 3" where they connect.

    i went with the Ebay Stainless Steel Lt's and Pacesetter 3" ORY...
    2000 SS - The Wicked Witch: °°Cammed 'n Slammed°° 458rwhp/410rwtq
    Quote Originally Posted by Bowtie_girl30
    I was hoping to just hump her up the exhaust cause she is so damn sexy....
    "Never argue with an idiot. They drag you down to their level, then beat you with experience."

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    Member danziger's Avatar
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    Le Mans Blue
    2004 Z16

    I liked my MACs a lot. They aren't LTs...they're mid-length headers. EASY install (both dropped in from the top after removing plugs, coil-packs and pass-side valve-cover) and great clearance with good power. You will lose some TQ gains versus LTs, but up top it will be pretty close. Make sure the welds are ground down and I personally like the "collector mod", which eliminates the ball-flange. Using GM cats in the Y-pipe, my MACs gained 18-20rwhp...

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    member since may 2000 nhraformula's Avatar
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    black
    2000 nhra edition formula

    macs are some really good headers and make just about the same power as LTs
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  5. #5
    Impounded MikeSomething's Avatar
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    Thanks for the input guys! I went w/ them cause I was concerned more or less about clearance issues.

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    Hugger Orange
    1999 Camaro Z28

    OK. School me here. I'm in the process of installing some MAC mid length headers with MAC Off Road Y pipe. Is this NOT going to fit into my SLP Loudmouth exhaust? Do I need some sort of a transition now?

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    Member danziger's Avatar
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    My MAC Y-pipe went to my SLP Loudmouth with no issues...

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    Visualize°Design°Create SSwt00SS's Avatar
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    '12 Silver SS 1SS
    '00 Black SS #8617

    good news! now, how do you like the sound and performance...?

  9. #9
    Senior Member INMY01TA's Avatar
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    2001 Trans Am (sold)

    I had Macs on my car for like 4 years. My Mac y pipe hung pretty low and I had worse clearance with them than I do with my current long tube set up. Powerwise they were pretty darn close. Long tubes sound less raspy tho.

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