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Free minder
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2 in 1 out vs 2 in 2 out muffler
I am sure there were plenty threads about this topic, but I am excited to contribute...I picked up a sport muffler that I will install tomorrow, to replace my 2 in 1 out OEM muffler.
I will record the sound of the old muffler and compare with the new. This should be fun. The muffler I picked up is the same as my original, but with the sport modification that many have done. At least I will still have my original if it is too damn loud  . 
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1978 SC Targa, DC15 cams, 9.3:1 cr, backdated heat, sport exhaust https://1978sctarga.car.blog/ 2014 Cayenne platinum edition 2008 Benz C300 (wife’s) 2010 Honda Civic LX (daughter’s) Last edited by Aurel; 03-26-2021 at 02:50 PM.. |
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03-26-2021, 01:52 PM
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There cannot be too many exhaust sound comparison threads.
 Thank you for starting another. I’m still waiting for the definitive SCART sound thread. Currently I think the M&K 2 in 1 out is THE definitive flat six sound for a 3.2... Looking forward to the results.
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74 911 3.2 |
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03-26-2021, 03:42 PM
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Free minder
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Here is the baseline sound with 2 in 1 out.
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1978 SC Targa, DC15 cams, 9.3:1 cr, backdated heat, sport exhaust https://1978sctarga.car.blog/ 2014 Cayenne platinum edition 2008 Benz C300 (wife’s) 2010 Honda Civic LX (daughter’s) |
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03-26-2021, 05:27 PM
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Registered
Join Date: Jul 2005
Location: Atlanta
Posts: 1,241
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The 2 in 1 out wins for sound hands down, but there is more power with 2 in 2 out. Is what it is.
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No physical quantity completely explains its own existence |
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03-26-2021, 05:38 PM
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Free minder
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And here we go:
Straight pipes no muffler (very bad for the neighbors). 2 in 2 out. Louder for sure but not excessively obnoxious. Love it so far.
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1978 SC Targa, DC15 cams, 9.3:1 cr, backdated heat, sport exhaust https://1978sctarga.car.blog/ 2014 Cayenne platinum edition 2008 Benz C300 (wife’s) 2010 Honda Civic LX (daughter’s) |
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03-27-2021, 06:29 AM
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I went the 2x2 route a couple of years ago and love it.
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Billy, MoosgrunMetallic - 81 911 SC - (Carbon fiber Wrap) Drank the Koolaid in 82 |
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03-27-2021, 06:55 AM
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Join Date: Jan 2002
Location: west michigan
Posts: 26,608
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I've had both the 2X1 and the 2X2 on my 78SC with SSI's and M&K muffler
The 2X1 sounds real nice with no drone. The 2X2 has some drone in low to mid rpm's.....but it literally screams above the drone area. For my money...2X2 and keep the engine rpm's over the drone rpms.
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78 SC Targa Black....gone 84 Carrera Targa White 98 Honda Prelude 22 Honda Civic SI |
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03-27-2021, 08:10 AM
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Join Date: Oct 2007
Location: San Pedro
Posts: 584
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2x2. Period.
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1979 911SC 3.2 SS Custom Backdate Hot Rod 1972 911T, 2.7RS Spec Beck 904 Carrera GTS /3.6 2023. Macan Previously owned several 911 models since 1975. |
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03-27-2021, 08:36 AM
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Join Date: Mar 2020
Location: Vancouver Can
Posts: 347
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Like the sound of your 2in 1out..hope my dansk 2 in 1
Will sound the same with SSI's 3.0 dansk 60 mm tip though. You think it will be somewhat same sound? |
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03-27-2021, 08:40 AM
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Free minder
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The 2 in 1 out is more throaty and sounds nicer at idle, but it is too quiet when you step on it. The 2 in 2 out really screams at higher rpms, which I really like. It is also quiet enough in fifth gear on the highway. Actually, I may use the fifth gear more often for that reason.
I will also test the option of blocking one outlet with a baffle. I have to remember to save the tomato paste can next time we make pasta .
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1978 SC Targa, DC15 cams, 9.3:1 cr, backdated heat, sport exhaust https://1978sctarga.car.blog/ 2014 Cayenne platinum edition 2008 Benz C300 (wife’s) 2010 Honda Civic LX (daughter’s) |
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03-27-2021, 01:45 PM
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1974 Porsche 911
Tie Fighter
