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Old 11-03-2001, 06:52 PM   #1
Scooby Newbie
Member#: 11913
Join Date: Nov 2001
Location: SF Bay Area
2000 Forester

Question why not a good turbo muffler instead of expensive cans?

it's been my experience on my BMW that most aftermarket "performance" mufflers are nothing but straight pipes through a can. sometimes those straight pipes are perforated and sometimes (as in the case of the Dinan muffler that was installed on my car) they're literally just straight pipes through a dummy can for $700!

read more about the BMW saga here if interested:


has anyone tried just having a turbo muffler installed, like the Walker DynoMax (BTW... well built, good warranty and available at many muffler shops)? the idea of a turbo muffler is that at lower RPMs, the exhaust takes a longer path through the muffler, making it quieter. at higher engine speeds/load, the exhaust gasses pass through a more direct route to the muffler outlet. you could probably get one of these installed for less than half the cost of some "special" muffler alone (no labor). this seems like a much better solution than running 3" tubes and loosing your low end torque.
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Old 11-03-2001, 07:04 PM   #2
Scooby Specialist
Member#: 10228
Join Date: Sep 2001
2002 Subaru WRX


I had a Dynomax mufler installed on my 95 Dodge Neon and a dual muffler setup on my '00 Dode Dakota and both were great as far as power gains go.

When buying a brand name system, a lot of time the mark up is the name. Sure there is Greddy, HKS, Sti, etc. And they have great products. Sometimes the price is reasonable, but sometimes the price is absurd. Your paying for a lot of R&D that goes into the test fitting, fabrication, dyno testing that goes into a particular system. On top of that the retailers are jacking the prices up for us Subaru people since the market is still a bit small when compared to a honda.

Now any good muffler shop can make you a system that could compare to what you can buy in the after market. I could have equally paid around 400 for a Borla system in my Neon, when I paid only 200 for the muffler shop to do a Dynomax. I paid about 400 for a dual exhaust in my truck, when I could have got a prebuilt bolt on system for around 600.

The choice is yours. Premade/brandname system. Or get a reputable mufler shop to make you something with a "look-a-like" can for a little cheaper. I think the performance gains will be equal. No one will know the difference but you.
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Old 11-03-2001, 07:14 PM   #3
Scooby Newbie
Member#: 11913
Join Date: Nov 2001
Location: SF Bay Area
2000 Forester


my point is also that bigger isn't better with respect to exhaust tubing diameter. 3" pipes really kill your low end torque and only put a little bit of the power back at the upper RPMs.

how restrictive are the stock subaru systems anyway?
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Old 11-03-2001, 08:44 PM   #4
Scooby Specialist
Member#: 1911
Join Date: Jul 2000
Location: Seattle, WA, USA
2000 Impreza 2.5RS
Silverthorn Metallic


The stock systems are fine for stock motors, but if you put a turbo on you'll need larger piping.

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Old 11-04-2001, 06:11 AM   #5
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Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
'01 GC8 Dinged STM
'09 Concours 14 ABS Black


these engines are VERY well balanced as far as intake and exhaust. The Intake is a little on the restrictive side but not much for a factory car.

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