I'm looking at the Dynomax Cat-back. There is a choice of the super turbo muffler, or the ultra flo muffler. I'm looking for something quite. which muffler is quieter? not dronning, but peaceful. anyother recomadations for a quite but flowing cat-back system.

I'd keep my OE system, but my intermidate pipe just blew out by the Dual cats.
thx

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89 Formula
96 Impala SS

 

super turbo will be closest to stock. Ultra flow will be LOUD

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

Got Beach?

 

i have ultraflo on my 305TPI and it is loud only when revved upwards of 2500, below that it just sounds like a mean car but suttle

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1987 Black 305 TPI 5spd IROC, seems to be fully loaded, but can't find RPO codes.

AIM: IROC 5spd
http://www.geocities.com/chevy5spdiroc/87Roc.htm

 

Dynomax ultra-turbo is about as quiet as it gets, unless you take the cats out .

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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, MSD coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley module, ported plenum,
Ported Daytona Yellow stock base, Moroso valve covers, other stuff,
Streetdampr, Ruger P95DC, hot wife, new oil filter, !cats, !TBC, !AIR.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."

 

My super turbo is not all that quiet. It has probably around 10,000 miles on it.

Oh, and I have stock exhaust manifolds, cat, and pipes. (305 TBI)

[This message has been edited by soulbounder (edited October 14, 2001).]

 

had my super turbo catback for 5 years and it is very mellow and sounds great on the gas but I am switching to something wilder because there is one thing I dont like about my dynomax -- it is not low enough. when I listen to other systems like the flows and hookers they have a much lower boomier tone that I like.
the dynomax sounds more like an open exhaust with a huge cam-- just air escaping -- no real earth shaking RUMBLE.
there is one advantage that the dynomax system has -- I think its the highest flowing crossflow system. good HP boost.

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88 WS6 T/A 305 TPI--
K&N,Air foil,hypertech chip, thermostat+fanswitch
free mods, dynomax catback, urethane motor+trans mounts, PST front end poly stuff, Earl's hyperflex brake lines SSM SFCs, Bilsteins very trick homemade ramair, Accel 300+ ignition system. Ported plenum, intake and heads with 1.94I valves.
Planning: Heddman 1-5/8 longtubes, NOS 150 plate, replace the "peanut"! and Eibach Sportlines.
check it out at:
http://www.geocities.com/transam617