DynoMax or Borla?
Thread Starter
Melting Slicks
Joined: Jan 2003
Posts: 2,713
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From: Shreveport LA
LA Events Coordinator
DynoMax or Borla?
I'm about to purchase new mufflers (my FlowMasters rusted out after 3 years!!!). Anyway, which is the better of the 2????
Last edited by vetteguy75; Jun 11, 2006 at 04:51 PM.
Melting Slicks
Joined: Mar 2005
Posts: 2,838
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From: Austin TX
In general, I'd say if you're over 40, you'll like the Dynomax Super Turbos,..if under 40, you'd likey prefer a chamber style (Flowmaster) or a straight-thru design.
The above is based on observations and anecdotal evidence,..nothing scientific.
I'm 47,..put me down for the turbos,..love'm and the seem to sound better with age.
The above is based on observations and anecdotal evidence,..nothing scientific.
I'm 47,..put me down for the turbos,..love'm and the seem to sound better with age.
CF Community Team
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From: Cape Cod, Mass.
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I put the Dynomax Super Turbos on my big block. They sound nice. Muscular idle and a nice roar at open throttle. They are a little on the quiet side but sound real good. No resonance at all in my 68 coupe. For the record, I'm 52 years old going on 18 and I like loud exhaust!!!!!!!!! Thank God I never grew up!
Le Mans Master
Joined: Jul 1999
Posts: 9,206
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From: Sewell NJ
I've got Dynomax Ultraflows and I like them a lot. I don't think there is going to be much difference between the two. Basically all they are is a perforated tube inside a shell with packing around the tube. Pretty much a modern version of the old glasspacks. Mine were pretty quiet when I bought them but now that they are broken in I have a nice rumble at idle and at WOT they open up nicely. At cruise they are fairly smooth with a nice tone. I get a little resonance at around 1500 rpm but it's not bad. Good luck with your purchase.
Team Owner
Joined: Jun 2004
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From: Smile, it's just the internet.
Dynomax UltraFlo or Super Turbo? The Ultra Flo is comparable to the Borla. Either are great and sound similar. Buy on price/warranty.
Flowmasters seem to have a habit of rusing badly...
Flowmasters seem to have a habit of rusing badly...
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Race Director
Joined: Nov 2002
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From: Taylor Michigan
I sell them both and would recommend the the exact fit Dynomax as the tips and brackets are exactly as OEM and provide a simple installation instead of a the requirements of Muffler Shop with tubing and a pipe bender in your garage to place those universal Flowmasters on the Vette. Buy the Dynomax! 
PS, plus they dont sound like rattling grapefruit cans.
PS, plus they dont sound like rattling grapefruit cans.
Le Mans Master
Joined: Oct 2004
Posts: 5,269
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From: Orlando Florida
St. Jude Donor '05
The UltraFlows are often on sale, maybe you get a good deal at the local muffler shop for installation and tailpipe fabrication. If your tips are in good shape they can weld these on the new (or use your old) tailpipes...
I had two stainless Borla mufflers before I installed the sidepipes, they sounded good. I think Ecklers sells them for around $500/pair. They list them for a C4 only but they fit fine, at least mine did...
I had two stainless Borla mufflers before I installed the sidepipes, they sounded good. I think Ecklers sells them for around $500/pair. They list them for a C4 only but they fit fine, at least mine did...
Safety Car
Joined: Jul 2002
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From: St Louis MO
Originally Posted by vettfixr
I've got Dynomax Ultraflows and I like them a lot. I don't think there is going to be much difference between the two. Basically all they are is a perforated tube inside a shell with packing around the tube. Pretty much a modern version of the old glasspacks.
Le Mans Master
Joined: Jul 1999
Posts: 9,206
Likes: 17
From: Sewell NJ
Originally Posted by Brettmc
Being at the end of the exhaust on our vettes, they don't have that old glasspack sound tho. I think another reason they don't sound like glasspacks is because of the large case size. I paired mine with an X-pipe and it's quiet. The best part is, you still get the superior flow characteristics of the straight-thru design.
The traditional glasspacks had a rappy kind of sound and a lot of noise when you lifted off the throttle. My Ultraflows have none of that. The only time they get rappy is at WOT and when you lift off there is no popping or other noise. I think the biggest reason for this is their location. I will reiterate that they get louder once broken in. I was a little disappointed when I first installed them. They were quieter than my stock mufflers at idle and didn't sound like much unless you were 3/4 into the throttle. Now, after about 1000 miles or so they sound like I thought they should at the beginning. The thing I like most about mine is the polished stainless shell which I know will last until I either get tired of them or I switch to driving a cloud.
Intermediate
Joined: May 2006
Posts: 33
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From: Palm Beach Gardens Florida
BORLA ALL THE WAY!!!! Don't get me wrong dyno max isn't a bad system but borla definately has a better product than dyno max. I can't tell u what to get so ur going to have to decide for urself. Let me know what ur going to do in the end.
Keith
Don't get me wrong dyno max isn't a bad system but borla definately has a better product than dyno max. I can't tell u what to get so ur going to have to decide for urself. Let me know what ur going to do in the end.Keith
Team Owner
Joined: Jun 2004
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From: Smile, it's just the internet.
One thing to mention about the UltrFlo is the use of fiberglass roving in the "can" as the sound absorber. The roving will burn out over time and the muffler will get louder as it does so.
Magnaflow uses rock wool instead of fibergalss. It's supposed to be immune to blow-out or burning.
Fact or fiction, you decide.
Magnaflow uses rock wool instead of fibergalss. It's supposed to be immune to blow-out or burning.
Fact or fiction, you decide.
Melting Slicks
Joined: Dec 1999
Posts: 2,116
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From: Mid West
Cruise-In III Veteran
I have Borla's on mine ... good mufflers but they were a little loud for me. I ended up adding an X-pipe and some Car Chemistry inserts to tone down the exhaust a bit. Good sounding, they just had an annoying resonance about 40mph. 
Le Mans Master
Joined: Oct 2004
Posts: 5,269
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From: Orlando Florida
St. Jude Donor '05
Originally Posted by vetteguy75
I'm about to purchase new mufflers (my FlowMasters rusted out after 3 years!!!).
If you're happy with the sound just shake all that stuff out and re-install your mufflers....
Melting Slicks
Joined: Mar 2006
Posts: 3,456
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From: Piedmont Va
St. Jude Donor '11-'12-'13,'19-'20
In general, I'd say if you're over 40, you'll like the Dynomax Super Turbos,..if under 40, you'd likey prefer a chamber style (Flowmaster) or a straight-thru design.
Uh Oh!...I just bought two flowmaster 40's, and I am about to turn 48. From everything I am reading in this thread, I should return them and go for Dynomax Super Turbo's....hmmmm decisions...I wonder if flowmaster will take them back if I put them on for a day, and don't like them and take them right off?
Pro
Joined: May 2002
Posts: 518
Likes: 17
That's funny, though I agree completely!
I have Dynomax ST's on my 71 Coupe, and they're pretty civilized with a H-Pipe.
Doug
I have Dynomax ST's on my 71 Coupe, and they're pretty civilized with a H-Pipe.
Doug
Originally Posted by 73, Dark Blue 454
In general, I'd say if you're over 40, you'll like the Dynomax Super Turbos,..if under 40, you'd likey prefer a chamber style (Flowmaster) or a straight-thru design.
The above is based on observations and anecdotal evidence,..nothing scientific.
I'm 47,..put me down for the turbos,..love'm and the seem to sound better with age.
The above is based on observations and anecdotal evidence,..nothing scientific.
I'm 47,..put me down for the turbos,..love'm and the seem to sound better with age.