Muffler for 5.8 L
However, being "noticed" for being loud is a lot like being noticed for being drunk. Not necessarily the kind of attention you want or need in a truck that "speaks" for itself. Don't know about your area but a nice old truck gets the attention of many of the local constabulary just because they appreciate it. And once you are on their radar figuratively speaking, the loud will get you noticed... and pestered even if its just to stop you to have a look at it. Can't tell you how often I get stopped in my Sky, the Bronco, or the '68 Deville just because they want a look. And that's not with the added attention draw of loud anything on the vehicles. That's just my humble $0.02. Take it for what its worth. Better flow will gain you performance but calling attention to it is like bragging BEFORE the race.
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 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.









