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Borla, Magnaflow, and Dynomax muffler experience...

This is a discussion on Borla, Magnaflow, and Dynomax muffler experience... within the External Engine forums, part of the LSx Technical Help Section category; ...

  1. #1
    Gear Head
    Join Date
    Jan 2006
    Palos Hills, IL

    Bright Red
    1992 Z28

    Borla, Magnaflow, and Dynomax muffler experience...

    I'm currently in a dilemma attempting to choose mufflers for a new dual exhaust for the Z. I've narrowed it down to the mufflers that will possibly be able to fit in the stock location. Unfortunately I haven't been able to hear any of these mufflers in person to tell if I'll be happy with them. Here are some of the requirements I'm looking to meet:
    Must be 3" in/out (dual 3" exhaust)
    I don't like the raspy LM tone....I'm looking for a nice sports car rumble...something mean and aggresive.
    Can't be "wake the dead" loud so I'm getting pulled over or be so loud and annoying I get a headache and don't enjoy driving the car. Pretty much more mild when driving or cruising, but has a balls out sound when WOT. Here's what I've narrowed it down to:
    • 12469 – 3” dual/dual 18”case x 24”overall x 5”thick x 8”wide
    • 14419 – 3” 14”case x 4”round x 20”overall
    • 17554 – 3” Ultraflo X 20x9.75x4.5 25”overall
    Borla XR-1 3” in/out
    • 40943 – 12x4.5x7 7/8 oval $140
    • 40944 – 16x4.5x7 7/8 oval $153
    • 40085 – 15” long 5” round $130
    Stainless Works

    I'm currently making some Borla XR1's out of cardboard to test some setups.
    I've heard the dynomax is pretty quiet...almost too quiet...I've heard the XR-1's are quiet, but open up at WOT....but then I've heard they are too loud....anybody have any personal experience with any of these?
    The exhaust is Hooker 1 3/4" LT's, dual mandrel bent 3" over axle, no cats, X pipe into muffler, out to 3" tips.

    - Joel

  2. #2
    Junior Member
    Join Date
    Aug 2005

    2002 Camaro SS

    Just switched to magnaflow from a LM. Sounds nice. LM was too loud with LT kooks headers (even with cats!!!).

  3. #3
    Junior Member
    Join Date
    Oct 2005
    Niles, Michigan

    2005 CTS-V

    I have magnaflow on my car and I really like it!!!

  4. #4
    Rice Hungry GottaHaveLS1's Avatar
    Join Date
    Oct 2005

    1999 Trans Am M6

    Magnaflow is the shit yo! It's a little quiet by itself but LT's can change that as everyone knows.
    1999 Trans Am M6
    SLP Short Throw, Lid and CAI, BMR STB and SFC, UMI PHB, Pacesetter LT's and ORY, Magnaflow Catback, DMH 3" E-Cutout, LS7 Clutch, Motive 4.10, 160 T-Stat, MSD, !AIR, !EGR, 17x9.5 Chrome C6's wrapped in Hankook 275/40/17

    Tuned at Mongillo Motors in New Haven, CT

  5. #5
    Member ttocs's Avatar
    Join Date
    Jan 2006
    jim thorpe, pa

    98 z28 m6

    Borla here. A little pricey, if it wasnt on the car when i bought it i prolly would have bought something else. I love the sound of it though! Cant wait, tomorrow i put on my grotyohann lt headers and mufflex catless y w/ merge.

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