Exhaust: Magnaflow or Dynomax? - Pontiac GTO Forum
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post #1 of 16 (permalink) Old 07-06-2011, 03:44 PM Thread Starter
 
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Exhaust: Magnaflow or Dynomax?

First thread here I actually don't own a goat but have a '66 Bonneville.

The exhaust is fine, with no leaks or rust issues, but it's got two of those cheap "turbo" mufflers you find at Pep Boys on her. The car sounds like a classic with a big engine, rumbles a bit but doesn't have the bite I think it should have. I'm not looking for Flowmasters wake the neighborhood, just something for when I want a nice exhaust note.

Goal: a bit louder than my cheap muffler but not particularly loud; no interior drone, nice sounding idle, not loud on light throttle, but I want a roar on WOT. Oh, and STAINLESS.

I've narrowed it down to either a Magnaflow or Dynomax Ultra flo.

Muffler is offset/offset 2 1/4, anyone help me out in choosing? Already looking at youtube muffler samples..
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post #2 of 16 (permalink) Old 07-06-2011, 07:41 PM
 
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I have a magnaflow on my 65 ( 02 LS1 motor) and it sounds awesome. not obnoxious at all cruising but when you give it the gas it has a nice throaty sound
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post #3 of 16 (permalink) Old 07-06-2011, 10:29 PM
 
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A 66 Bonny is a nice car...got any pics??



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post #4 of 16 (permalink) Old 07-08-2011, 07:11 PM Thread Starter
 
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The cancer spot you see in the rear pic has since been half-ass fixed. I took the bumper off, sanded what I could and sloppily filled and painted it and put the bumper back on in 3 days. Oh the joys of living on a college campus with no car repair allowed..
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post #5 of 16 (permalink) Old 07-09-2011, 05:43 PM
 
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I am running the dynomax on 2.5" true duals and headers on a 463 and they sound great....nice low rumble on idle and cruise, no dronning, and when you dump into the secondaries they GRRRRROWL lke a Pontiac should. Not too pricey either.
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post #6 of 16 (permalink) Old 07-10-2011, 07:06 AM
 
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your car looks great...my brother has used the Walker Dynomax mufflers on several of his classic cars (2 1970 Skylarks, '67 El Camino and a '64 Riviera) with obviously excellent results since he keeps going back to them for his mufflers...

I don't think you can go wrong with either but my Magnaflow experience is on a 2000 Escalade and a 2006 GTO...good luck with your choice...

Bill

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Like what you've got?...Thank a Vet!
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post #7 of 16 (permalink) Old 07-10-2011, 10:58 AM
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You should post an exhaust sound clip before/after.

My personal preference between those two is for the Magnaflows.

I use Hooker Aerochambers on my car and they are really great quality and engineering especially for the price.
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post #8 of 16 (permalink) Old 07-10-2011, 03:56 PM
 
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Nice B'ville!



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post #9 of 16 (permalink) Old 07-10-2011, 04:11 PM
 
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That car makes me wish I still had my 65 Catalina.
Looking good man. I have Slowmaster super 40's on the truck. Got them cheap. I do like the sound. Some before and after sound bits on youtube would be great. Just video phone them and post up.

I have a soft spot for Bbody's. I have had 3 Olds 98's (74' -79'- 80'), a 65 Catalina, and still have a 66 ss Impala. Would love to get a 2 door 69 Buick 225. The 225 and the Bonn-evil look great all stock and dual exhaust.

66 GTO 4bbl power windows A/C auto
67 GTO H.O. Convert 4spd
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post #10 of 16 (permalink) Old 07-11-2011, 12:48 PM
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Take a look at Magnaflow universal muffler part#11265 it's a 4x9x18.
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