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  1. #1 Re: speed daddy headers on n/a engine 
    GXP Level Member Grimsin's Avatar
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    keep your stock resonator or get the longest glasspack possible, I put a 26'' long glaspack in mine, it stopped the rasp/popping noises at high rpms by alot.
    page 11 of my car thread in my signature there is a video of my exhaust without and with a glasspack.
    Last edited by Grimsin; 04-20-2014 at 07:54 PM.

    3.8l N/A POWA! :4'' HAI\L67 HVTB\HV3\ER Rockers\WP underdrive pulley\Headers\cat delete\91 octane overkill incar tune.3.69 gears, Trans go shift kit.
    My Car:http://www.grandprixforums.net/threa...2005-Impala-LS
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