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Direct Flowmaster 80 replacement?

This is a discussion on Direct Flowmaster 80 replacement? within the External Engine forums, part of the LSx Technical Help Section category; Currently intstalled (by previous owner) Flowmaster Cat back Dual 3.00" Outlet 5.00" x 10.00" 80 Series Crossflow Muffler 3" inlet ...

  1. #1
    Member MnLS1's Avatar
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    Direct Flowmaster 80 replacement?

    Currently intstalled (by previous owner)
    Flowmaster Cat back
    Dual 3.00" Outlet
    5.00" x 10.00" 80 Series Crossflow Muffler
    3" inlet

    Any suggestions? I was thinking magnaflow. I have shitty shorties, and am getting pacesetters, or ss autochrome LT's also. Like the title says I want a direct replacement. Thanks for the input.
    Last edited by MnLS1; 03-06-2008 at 01:40 PM.

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    Member 89LX's Avatar
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    Hooker Aerochamber

    I have the Hooker Aerochamber and it sounds great IMO. Mellow idle and comes to life at WOT.
    2000 Z28 M6, SLP Lid, SLP Bellows, SLP UD,
    P&P Maf, TB By-Pass, PS Shorties, LS6 Intake, FAST 78mm TB, Hooker CB, Hurst Billet, Front Tower Brace, small 218/218....527/527....114 cam.
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    Member 180ls1's Avatar
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    1998 Firebird Formula WS6

    stay away from the flowmaster either get the hooker or the magnaflow. the flowmaster only flows a little better then stock.

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    Member MnLS1's Avatar
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    Quote Originally Posted by 180ls1 View Post
    stay away from the flowmaster either get the hooker or the magnaflow. the flowmaster only flows a little better then stock.
    i just edited my original post, I allready have flowmaster and want to get rid of it with out having to mess with any additional pipes/ tubes(mine are still near perfect). I am hoping to unclamp, and reclamp. thanks again.

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    Member 180ls1's Avatar
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    1998 Firebird Formula WS6

    ok ya they are almost the same so look up the sizes and choose what fits best out of the hooker and tha magnaflow.

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    Member MnLS1's Avatar
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    thanks alot 180, im prolly going with the magnaflow, I have heard nothing but good things about em'

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    The Bandit Wesman's Avatar
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    1998 Trans Am WS6

    Magnaflow

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    Member 89LX's Avatar
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    Either

    Either one sound fine to me. Fitment and the product name...which ever works for you. They both are outstanding IMO

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    Member MnLS1's Avatar
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    I cant find any crossflows with dual 3" outs besides pypes http://www.pysales.com/iwwida.pvx?;i...0%201?comp=ppe
    anyone got any suggestions, I really was set on magnaflow, on their site they only have 3" in/ dual 2.5" out. I dont want to buy new 2.5" 3" adapter pipes, cut etc. any help/ sugg./ part #'s greatly appreciated!

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    Thumbs up

    Dynomax Ultra-Flo

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    Junior Member SummitTech's Avatar
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    Quote Originally Posted by tripp_symmes View Post
    Dynomax Ultra-Flo
    +1,

    The only crossflow single 3" inlet dual 3" outlets I can find are the WLK-17536 and WLK-17670.

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    Senior Member GULLETT17's Avatar
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    00 TA PWTR, 98 VertTA NBM
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    Member MnLS1's Avatar
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    how many CFM should I look for? I found one that I like the sound of but its only 705 cfm. I will soon have lt's, full bolt ons, z06 intake. Dont plan on doing heads/cams. Do i need a super high flow muffler that is around 1100 cfm or will I not be able to tell the difference. Any sound clips of the Dynomax 17536? Thanks alot guys!

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by MnLS1 View Post
    how many CFM should I look for? I found one that I like the sound of but its only 705 cfm. I will soon have lt's, full bolt ons, z06 intake. Dont plan on doing heads/cams. Do i need a super high flow muffler that is around 1100 cfm or will I not be able to tell the difference. Any sound clips of the Dynomax 17536? Thanks alot guys!
    First of all, you can not compare mufflers by cfm. Most manufacturers do not list the cfm's and if they did they almost always do not tell you what precedure they used to test them. Although, if they gave you specifics of what cfm a straight pipe would flow, then that would be what you would base the cfm off of.

    Second of all, are you more concerned about sound of performance?

    If you would like it to sound good, then you are going to have to sacrifice some performance. If you want all out performance, then the sound might be a pretty quiet.

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    Quote Originally Posted by 180ls1 View Post
    stay away from the flowmaster either get the hooker or the magnaflow. the flowmaster only flows a little better then stock.
    i just bought a ws6 and it already had a flowmaster on it so i wasnt gonna buy a new muffler i had a 95 impala and put spintech mufflers on it and it sound wicked with the custom built engine i had in it so are u saying i need to lose the flowmaster

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    just got a set of obx racing haeders can anyone tell me about how long it would take to do myself or about how much i would be looking at if i was to bring them some were and have them put them on???
    thanks
    john

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