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Hi
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Pre Muffler or Cat bypass
I'm looking at replacing my cat converter with a bypass, for track purposes only.
 Looking at my options, they range from $169 for a Bursch to $300 plus for a Fabspeed or M&K. Is there a hugh performance or quality difference for almost double the price?  Your thoughts.... |
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03-30-2010, 08:02 AM
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Registered
Join Date: Oct 2002
Location: St. Louis region
Posts: 3,147
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Premuffler. Big + on MK quality (not Fabspeed!), + on hp. Do a search on premuffler and Anderson.
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Deceased: Black '88 Carrera Coupe, Steve Wong and Russell Berry chips, Dansk premuffler, custom MK GT3-style muffler, Magnecores. Al Reed 7 & 8 X 16 Fuchs. Full Elephant Racing suspension, 21/28 T-bars, Turbo tierods, bump steer kit, Bilstein Sports, BK strut bar. Ruf bumpers, 935 mirrors, Carrera 3.0 tail, DasSport bar. '11 BMW 328iX, '18 Nissan Frontier 4X4, '92 Acura NSX. |
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03-30-2010, 08:17 AM
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Northern Motorhead
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Like Wavey says...
MK is a good choice as the O2 sensor captures both banks . I've had one on my Carrera since last Summer and it's a nice piece of work ! Cheers ! Phil
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Cheers Phil 89 Coupe,Black,95 3.6 engine and the list goes on ... 1983 944 SP2 race car PCA #96 |
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03-30-2010, 08:25 AM
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No sleep 'til... BROOKLYN
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Do a search on pre-muffler or cat bypass, there are plenty of threads. You might want to check this thread on the sounds of different setups.
The ultimate exhaust sound clip thread! Take care.
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-Orlando- '89 3.2L G-50 '77 S w '79, 3.0L '90 T-3 Syncro 32C #16 |
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03-30-2010, 08:34 AM
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Pre Registered
Join Date: Dec 1999
Location: Out of kindness, I suppose.
Posts: 1,826
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Pre-muffler.
I've not used the M&K, but they get good reviews here. I installed the stainless Dansk pre-muffler shown below, which is also a nice piece.  Tim |
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03-30-2010, 08:46 AM
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Registered
Join Date: Oct 2002
Location: St. Louis region
Posts: 3,147
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Yes, the OEM style Dansk is good too, that's what I have. But I believe they're really expensive now, maybe more than the MK?
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Deceased: Black '88 Carrera Coupe, Steve Wong and Russell Berry chips, Dansk premuffler, custom MK GT3-style muffler, Magnecores. Al Reed 7 & 8 X 16 Fuchs. Full Elephant Racing suspension, 21/28 T-bars, Turbo tierods, bump steer kit, Bilstein Sports, BK strut bar. Ruf bumpers, 935 mirrors, Carrera 3.0 tail, DasSport bar. '11 BMW 328iX, '18 Nissan Frontier 4X4, '92 Acura NSX. |
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03-30-2010, 10:44 AM
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Northern Motorhead
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I have the MK premuffler along with a Fabspeed one in,two out exaust and the sound is very liveable,no droning or unpleasant sounds while driving ...
Maybe the MK is cheaper in price as you don't pay for all the shiny bling bling of the Dansk or Fabspeed premuffler. Wavey,don't get me wrong here ... lol I like my shiny Fabspeed muffler with the dual oval tips  Cheers ! Phil
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Cheers Phil 89 Coupe,Black,95 3.6 engine and the list goes on ... 1983 944 SP2 race car PCA #96 |
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03-30-2010, 11:44 AM
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Hi
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have you guys ever heard of Maxspeed Motorsport's cat bypass?
I believe they're based in Canada. |
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03-30-2010, 11:56 AM
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I'm a loser, baby.
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Bursch seems adequate for near half the price. Straight through design and it doesn't increase volume much.
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1979 911 SC |
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03-30-2010, 12:06 PM
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Registered
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Maxspeed Motorsports
I think you probably found my post on another thread about the Maxspeed unit. I still recommend it for the price. The Brusch is mild steel not 301 stainless and will inevitably wear out/rust quicker--that is why its half the price. In addition the 02 sensor bung is forward of where the left and right exhaust banks meet, this equates to the sensor not operating properly.
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1990 964 C4 Coupe & 1991 964 C2 Coupe (current) 1989 911 Targa (sold) 1996 993 Cab. (sold) 1999 x2 Boxster (sold) 2006 Cayman S (my daily) |
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03-30-2010, 12:14 PM
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Checked out
Join Date: Jun 2009
Location: On a beach
Posts: 10,127
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i like the oem Euro pipe. can find them used for $100 or less.
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03-30-2010, 12:15 PM
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CoastDog
Join Date: Aug 2001
Location: BC
Posts: 30
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Is there an advantage to the expanshion chamber vs straight pipe in terms of performance? noise?
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'83 911SC Targa '87 Carrera coupe '05 Triumph 1050ST ‘02 BMW R1100S |
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04-01-2010, 12:21 PM
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Registered
Join Date: Oct 2002
Location: St. Louis region
Posts: 3,147
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Yes. According to Anderson, the premuffler makes more HP, believe it or not. It's not an expansion chamber, it's actually a small muffler.
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Deceased: Black '88 Carrera Coupe, Steve Wong and Russell Berry chips, Dansk premuffler, custom MK GT3-style muffler, Magnecores. Al Reed 7 & 8 X 16 Fuchs. Full Elephant Racing suspension, 21/28 T-bars, Turbo tierods, bump steer kit, Bilstein Sports, BK strut bar. Ruf bumpers, 935 mirrors, Carrera 3.0 tail, DasSport bar. '11 BMW 328iX, '18 Nissan Frontier 4X4, '92 Acura NSX. |
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04-01-2010, 12:28 PM
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Registered
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Pre Muffler
I can't speak for other brands, as I have only had the M&K premuffler on my Carrera and have been very happy with it. It sounds really nice and definitely made my 3.2 lively above 4k, with no real negative at lower RPM's.
When first started looking, I looked for a Euro pre-muffler or a used premuffler. The euro premuffler are hard to find and if there is one for sale, have to act super fast as people tend to jum pon them. I could not get one after 6 months and so I gave in and bought a new one from Ben. |
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04-01-2010, 12:40 PM
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Throw it on the ground!
Join Date: Aug 2006
Location: Atlanta, GA
Posts: 2,566
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Mark 1987 911 Coupe Granite Green Metallic My Cousin's Wife's Sister's Husband is a Lawyer. |
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04-01-2010, 12:51 PM
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Gretchen
'89-911-3.2
1979 Porsche 911 SC 3.0L
1989 Porsche 911 Carrera
1999 Porsche Boxster
2010 Mercedes-Benz SLK 280
Cayman
964
G50 Targa
