Originally Posted by
cc250r
I have a 3" flowmaster 44 with no cat on my truck right now that exits right before the rear tire and i really dont like it it sounds like all my friends jeeps its very low and droney it just kind of sounds like a big exhaust leak. So i am thinking of buying a 4" tailpipe off and a 5" tip off of summit i want to get a new muffler to but i dont know what muffler I should get any suggestions?
I have listed here a muffler shootout test done by CAR CRAFT:
The Mufflers
MAKE MODEL Part No.
SUMMIT Turbo 630125
THRUSH Magnum Glasspack 24214
THRUSH Boss Turbo 17718
HOOKER Competition 21006
DYNOMAX Super Turbo 17733
DYNOMAX Race Magnum 24215
HOOKER Super Competition 21106
SUMMIT Fully Welded 630325
FLOWTECH Afterburner 50322
MUFFLER FLOW TEST
MUFFLER Flow at 28-in H20
DynoMax Race Magnum 528.64 cfm
Thrush Magnum Glasspack 507.40 cfm
Summit Fully Welded 343.38 cfm
Flowtech Afterburner 342.20 cfm
DynoMax Super Turbo 333.94 cfm
Hooker Competition 232.46 cfm
Hooker Super Competition 320.96 cfm
Summit Turbo 331.16 cfm
Thrush Boss Turbo 297.36 cfm
MUFFLER Idle dB WOT dB
DynoMax Super Turbo 89 123
DynoMax Race Magnum 94 133
Flowtech Afterburner 92 124
Hooker Competion 92 122
Hooker Super Competion 90 125
Summit Turbo 89 124
Summit Fully Welded 92 125
Thrush Boss Turbo 90 123
Thrush Magnum Glasspack 92 128
DYNO TEST
All mufflers were dyno-tested on a 355-cube SBC with 10.0:1 compression, Air Flow Research 190 aluminum heads, a CompCams 292 hyd. a Victor Jr. intake, a Holley 750-cfm double-pumper, and 1 5/8 Headman headers.
While there are mufflers that will out flow a glass pack design, it also depends on the design. Does the glasspack use "louvers or perforations" - Louvers reduce the flow by as much as 50% but Allied resonators (that sell for $30-$40 each and available at any muffler shop) in independent test flowed 90%+ of a "race spec muffler". Others using other brands consistently showed similar results.
The CATS absorb about 60-70% of the sound........IMHO, I would go to a local muffler shop & have them drop the muffler...listen to it, it may be to your liking....if it needs the tone changed, then have them hold up different mufflers until you find "your sound".
I am running 2- 3" diameter, 24" long Allied resonators on mine.....they are very deep toned, nice rumble on accel/decel and little to no drone (depends if the weather is raining, then there is some, but very small- not enough to be an irritant). I (and my family) have used these on just about everything since the 60's and have never had one "fail" or loose it's sound, etc.