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Thread: LS1 Swap ... muffler questions

  1. #1
    Join Date
    Dec 2010
    Location
    Poteau, Oklahoma
    Posts
    62

    LS1 Swap ... muffler questions

    Well...LS1 swap was a success, (NOW I NEED ADVICE).
    Question 1: I would love to hear everyone's opinion on which mufflers I should run on my 68 Chevy truck with a 5 speed standard with my true duel exhaust system without catalytic converters. I want it to be nice and loud outside when i HAMMER DOWN but i want to cruise and carry on a conversation while i go down' the highway. Price is a concern for me as this swap has drained Ft Knox of all play money. So lets hear it; LIKES & DISLIKES & WHY i should choose one over another. Flowmaster, Hooker, Summit, Thrush, Dynomax, Magnaflow, Borla, or a nice off brand, etc.
    THANKS!

  2. #2
    Join Date
    Jan 2009
    Location
    Rockwall, TX
    Posts
    558
    i prefer magnaflow nice quiet rumble at idle then a deep and loud at WOT

    1989 RCSS 5.3/4L60E swap
    - 224/230 .581.591 112lsa,
    - 3200 Stall
    - DJM 4/6 drop
    - Nelson Tuned

    Building the truck GM never did..

  3. #3
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,064
    I could barely hold a conversation in my 69 with dual Flowmasters on it. Just a mild 350 and duals. I'd go with magnaflow for something like that.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  4. #4
    Join Date
    Dec 2008
    Location
    san antonio TX
    Posts
    1,369
    straight pipes FTW haha jk. i like dual 14" case magnaflows
    1982 c10 lsx swaped, NP tuned, true duals, 4:11s, trutrac, e-fans, CAI

  5. #5
    Join Date
    Mar 2011
    Posts
    11
    I like magnaflows

  6. #6
    Join Date
    Oct 2008
    Location
    Scott, Arkansas
    Posts
    431
    I like the Hooker Maxflow myself. I have no problem with the Magnaflows either but the Maxflow will put down more power than a traditional muffler since it has a strait through design. They are quiet below 3k rpms but sound like strait pipe at WOT!
    2005 Silverado SS AWD
    AEM CAI, ARH LTs, HD-2 shift kit with vette servo, Circle D 278mm 3200 stall Madtunesracing.com street tune (MTR now has a Dynojet 248 chassis dyno)

    13.82 @ 94.92 w/1.83 60'

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