badazta99

I have had the magnaflow cat-back with pacesetter headers and an offroad y-pipe on my 99 trans am for about 2 years and just recently i noticed that it is pretty loud out one side and out the driver side it is almost stock quiet can somebody tell me whats goin on.

thanx
Ryan

2K2WS6TA

iTrader: (2)

I'd say it might be a broken baffle in the muffler (any rattles when you bang on the muffler) FWIW sounds like a replacement muffler is in your future

badazta99

I haven't rattled it yet but i'll give it a shot, either way I need a new one. It's really starting to bother even though nobody but me can probably notice it.

Which is louder magnaflow or flowmaster

2K2WS6TA

iTrader: (2)

Don't get the flowmaster, the flow sucks on their ls1 system (80 series muffler IIRC), the magnaflow is probably little louder
Check out www.ls1sounds.com to hear the different systems

TUFAS4U

iTrader: (5)

arent Magnaflows guranteed for life? send in for a replacement maybe?

alans02z

iTrader: (9)

Mine does the same thing, but it doesn't rattle. So I am interested in what you find out too.

jimbo98z

iTrader: (3)

Yea, don't get the flowstopper, I've got one and its garbage as far as flow. Sounds pretty good with the cutout open though

magius231

iTrader: (8)

got proof of that?

Azrael

iTrader: (10)

My Magnaflow muffler part#14267 has a lifetime warranty... Might try just removing and sending it back to Magnaflow.

00SLPSS

iTrader: (15)

on my friends lt1 when he had the magnaflow catack it was louder on one side since day one. he replaced it with gmmg and the problem was solved

Scotty-Z

iTrader: (5)

I don't think there's any problem. Magnaflow uses a straight-through design in their mufflers, so there's no chance of any "broken baffle" or anything. The reason for it is the way Magnaflow designs their mufflers; they've been like this since they came out. They had one design to their muffler where there was an outlet on both sides, but they redesigned so that now both outlets are on one side and one wraps back around for the dual tip appearance. Mine was always quieter on one side because of this too; it's just something that the Magnaflow catbacks do. Not a problem with flow or anything broken, it's just the design.

technical

FWIW my magnaflow sounds very similar, on the passenger side, to no muffler at all. Before I put the muffler on I peeked inside the muffler and noticed there was a small chamber that was also directly open from the inlet and the passenger side outlet. That would account for the nasty sound. Overall the sound isn't bad, but single exhausts on LS1 F-bodies pretty much all sound like **** except for the SLP D/D which is quiet as hell.