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A smaller muffler than stock.

This is a discussion on A smaller muffler than stock. within the External Engine forums, part of the LSx Technical Help Section category; Will a smaller than stock muffler cause more backpressure? The smaller muffler is about 6 inches shorter and it has ...

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    Member SS-Power's Avatar
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    A smaller muffler than stock.

    Will a smaller than stock muffler cause more backpressure? The smaller muffler is about 6 inches shorter and it has a wide-open flow. Just need info on the backpressure.

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    old timer blue02Z's Avatar
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    depends on the inside of the muffer. you said its a wide open flow so it'll probably lower backpressure, oem mufflers are pretty restrictive. what kind is it?
    2002 Z28 M6, Suncoast Creations ram air, port/polish TB w/ bypass and bumpstop, heater hose mod, stainless steel long tubes, ORY w/ dual cutouts, Magnaflow, BMR SFC, UMI Torque Arm, LS7 clutch w/ drill mod, Pro 5.0 w/ Lous short stick, MSD wires, 4.10s, good maintenancehttp://www.fquick.com/blue02z

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    Quote Originally Posted by blue02Z View Post
    depends on the inside of the muffer. you said its a wide open flow so it'll probably lower backpressure, oem mufflers are pretty restrictive. what kind is it?
    not sure, it was a freebie from a friend. There's no logo on the muffler, but you can see right through it.

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    The Bandit Wesman's Avatar
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    If the muffler is straight through and same size as the rest of the exhaust, regardless of its length, it will not cause any backpressure.

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    old timer blue02Z's Avatar
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    Quote Originally Posted by Wesman View Post
    If the muffler is straight through and same size as the rest of the exhaust, regardless of its length, it will not cause any backpressure.

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    Quote Originally Posted by Wesman View Post
    If the muffler is straight through and same size as the rest of the exhaust, regardless of its length, it will not cause any backpressure.
    Yeah, its the same size. Thanks

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