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post #1 of 13 (permalink) Old 07-07-2009, 10:19 AM Thread Starter
 
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Help... Muffler Question...

What Mufflers do you all recommend? I got a 400ci that has been bored out, mild cam, flat top pistons, and has had some head work. It currently has hooker Long tube headers with 2 1/2" new exhaust pipe on stock mufflers. I want to get the most aggresive sounding exhaust out there. Any advice?
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post #2 of 13 (permalink) Old 07-07-2009, 02:44 PM
 
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Flow baby flow

Flowmasters
Just my opinion after working in an exhaust shop for 7 years.
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post #3 of 13 (permalink) Old 07-07-2009, 03:36 PM Thread Starter
 
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series...

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Originally Posted by LastOutlaw View Post
Flowmasters
Just my opinion after working in an exhaust shop for 7 years.
What series? the original 40 series? super 44? etc...
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post #4 of 13 (permalink) Old 07-07-2009, 05:46 PM
 
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Flowmasters are good but you can also check out these guys:
Pypes Performance Exhaust - Home Page
They even have sound clips.
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post #5 of 13 (permalink) Old 07-08-2009, 07:59 AM
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Garage
I have the 3" Pro Street series with X pipe from PYPES.
They are LOUD, sound aggressive and heads turn before I even arrive. They really announce your presence. So many people have complimented me on the sound and a few even asked if I had the VOE. The VOE has a deeper rumble where as the PYPES has a higher pitch.

On the downside, The droan at about 30-35mph can wear on your ear drums. Overall I like the set up. I have heard Flowmasters as well, and they also sound great. If one is looking for a really Loud aggressive sound Pypes has it.

Mine sounds like this on the 70 GTO>> Pypes Performance Exhaust - GM Sounds

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post #6 of 13 (permalink) Old 07-08-2009, 08:57 AM
 
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Back Pressure

I only have experience with the 40 series.
Keep in mind that the size is crucial. If you open it up too much you will lose back pressure robbing you of bottom end takeoff. I put a 3" exhaust on a mini van once with a v6 engine as an experiment. There was not enough back pressure and the city bus stomped me going up a hill from a standing start. Grin.
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post #7 of 13 (permalink) Old 07-08-2009, 11:08 AM
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I'm running Magnaflow mufflers and the sound is real good with no droan.
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post #8 of 13 (permalink) Old 07-10-2009, 08:59 PM
 
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magnaflow, pypes, flow-tech. They all flow better than 'flowmasters' Somebody should sue them for using that name.

1964 400 4 speed Roller cammed RoadRacer
1969 400 T400 auto 2nd owner
2004 LS1 6 speed modded for roadracing
1966 GTO Altered wheelbase former 1970s show car
1973 Challenger 360/727
1931 Ford Model A
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post #9 of 13 (permalink) Old 07-10-2009, 10:58 PM
 
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Buy some Spintech mufflers and don't look back.You'll love them!
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post #10 of 13 (permalink) Old 07-11-2009, 09:27 PM
 
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glass packs sound like old school muscle, nice rumble and cheap. the ole cherry bombs!!
12 inch will scream

2006 QSM/RED/M6/18"David
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