How LOUD is your 408?

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My 418 was VERY loud. Big compression, big cam, big cubic inch, along with big headers and big exhaust with no cats=big noise. Cats would quiet it down some, however, a change in mufflers would too (dont know what you run). I had the mac 3" cat back on mine with no cats and a 3" "X" pipe with 1 7/8 longtubes.
 
It sure seems like to me a set of high flow cats would calm things down :)

Now ... how much more quiet ... I'd have no way of knowing :shrug:

I can say when I moved from my simple self ported E7 combo which
had an exhaust of shortys, Bassani catted X pipe, and OEM catback
to my sig combo using the same OEM catback ...

I was surprised at how much louder the exhaust became :eek:

Hey ... more power means more noise :D

Grady
 
mine doesn't seem all that loud at idle or just puttering around the neighborhood. now when i step on it, it is a different story, but that is expected

my exhaust is kooks long tubes, 3" through a magnaflow tru-x mid pipe and flowmaster delta flow 50s, then they go down to 2 1/2" before they go up over the axle and out

i am going to accufab 3" mid-lengths

my neighbor has a couple of harleys and they are louder than is my car

keith, i'd look into pro-flo twisters, f-series. they are inexpensive and small and can be put in line pretty easily

http://www.flopro.com/Twister.htm
 
since alot of the rumble/bass comes from displacement. would adding a KB make 'sound' louder ,bigger at idle/cruise even though KB itself is quiet??
-im jus curious if 5.0L + 2.2L KB = 7.2L of rumble?:shrug: ?
 
Twisters for what? main muffler and sound deadening or in between header and mufler? I am going to have to get cats so I wont have room for adding twisters on top of the cats and mufflers.

Also, I thought you said you were running dynomax? Now I am confused as to which mufflers you are running. :shrug:
i was saying you could put them in line like this guy did (he actually has 4 in his):

http://www.superstang.com/Exhaust/index.html

i have the same mufflers as you ended up with when you were on your crusade to kill the drone, but mine are 3" in and out. if i said dynomax, sorry, i misspoke (senior moment i guess).
 
Man it sounds loud enough to shake the dentures out of the old folks:rlaugh: And to think the neighbors callad the cops on me last year for me being too loud geez.. Hey post up a sound bite of the 408 so I can blast it out my window at em :nice: