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Air Lid Help

This is a discussion on Air Lid Help within the External Engine forums, part of the LSx Technical Help Section category; I know that its a stupid question...but even till today I don't see a difference in an aftermarket lid...they say ...

  1. #1
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    Question Air Lid Help

    I know that its a stupid question...but even till today I don't see a difference in an aftermarket lid...they say it has more airflow...but how? It looks exactly like the stock one. I know

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    Member Tman's Avatar
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    Airlid is smoothed and contoured on the underside for increased air flow.
    Opening measures 3.5" in diameter for higher air flow.

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    Member jag42420's Avatar
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    http://www.xse.com/leres/ss/airlid.html

    Aftermarket lids flow better because the baffles are not there, they're smooth instead (see picture comparison above link). Aftermarket lids are also shaped a bit different where they contour into the piping. They also lose the tanks, cleaning up the engine compartment a bit.

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    what are those tanks for anyways...and do the aftermarket lids fit right?

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by burnws6 View Post
    what are those tanks for anyways...and do the aftermarket lids fit right?
    they fit correct

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    Member jag42420's Avatar
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    I'm not sure exactly why the tanks were there. I assume to hold pressure or to quiet the airlid. The factory lid was designed with the baffles to minimize whistling from the air passing through it. There is a slight whistle with some aftermarket lids. I replaced mine with a SLP. It was an easy fit for me, took less than 10 minutes. A few people have had trouble installing them. Mine fits like a glove.

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    Member jag42420's Avatar
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    Here's a good air lid article with some aftermarket comparisons http://www.motorsporttech.com/press/...ay2004_02.html

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    Member cobrahunter's Avatar
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    Side tanks are there to quite down the airflow into the throttlebody. Good for a loss of 10-12 HP. Kind of stupid, huh?

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    Thumbs up

    Hey jag42420

    Thanks for that Motorsport Technologies article.
    It was a good read.

    jess .........






    2002 ss - Black - A4 - 323 - SLP loudmouth 11 - SLP lid - SLP # 5846

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    A friggin fish! LOL buswwa's Avatar
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    Great article

    That pretty much sumed it up for me. SLP airbox lid definitley adds torque. I didnt expect too much horse power from just the lid, but the torque speaks for itself. Thanks for posting such a great article on what is typically the first real mod.

  11. #11
    Senior Member greatwhiteZ28's Avatar
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    i know that was my first mod on both of my ls1's (ta,Z) and when i installed it i felt a huge differnece. some people have different expectations when installing mods but you have to think its was only 100 $

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