Dual Outlet mufflers- types- pros and cons
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Dual Outlet mufflers- types- pros and cons
I am considering this and would like responses from owners who have done this to a street car. I would like recents experienses if possible. Thanks in advance.
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From: YQU
I did this last year (but to a track car, not a street car).
I added a Fabspeed dual out system without heat or cats. I used the FVD left rear bumper panel.
Overall it worked well, sounds great and dropped a great deal of weight (> 50 lbs versus stock) but I have no data to prove any power increase.
Marc
I added a Fabspeed dual out system without heat or cats. I used the FVD left rear bumper panel.
Overall it worked well, sounds great and dropped a great deal of weight (> 50 lbs versus stock) but I have no data to prove any power increase.
Marc
Burning Brakes
Joined: Jan 2011
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From: chin on taint
I have been running the Fabspeed dual outlet system for over 8 years and zero problems (well if you consider the occasional desire to polish the stainless a problem then so be it)
I just added the Fabspeed cat bypass and it definitely had a positive effect on the sound, it lowered audible level and exhaust note is deeper ...of course the "quieting " could just be an effect of a new piece replacing a 21 year old one but overall I am pleased with the system and as mentioned it saves a great amount of weight!
I cut the left bumper to fit the outlet , eventually will go with the FVD piece but am in no rush (it will wait untuil something else gets paintwork)
I just added the Fabspeed cat bypass and it definitely had a positive effect on the sound, it lowered audible level and exhaust note is deeper ...of course the "quieting " could just be an effect of a new piece replacing a 21 year old one but overall I am pleased with the system and as mentioned it saves a great amount of weight!
I cut the left bumper to fit the outlet , eventually will go with the FVD piece but am in no rush (it will wait untuil something else gets paintwork)
Instructor
Joined: Apr 2011
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From: London
I have a Hayward and Scott (http://www.haywardandscott.com) full system - exhaust manifolds, decat pipe and dual outlet system. It is a very good system and except as noted in the next sentence greatly improves the sound (as well as adding a bit of horsepower). A nice deep rumble at idling speeds and a great sound at higher rpms. My only complaint is that between 2800 and 3200 rpm (so 5th gear at highway speeds) the dual outlets seem to create a loud drone/resonance that can get annoying on longer trips. Otherwise no complaints.
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Joined: Jan 2007
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From: Vancouver Island, BC , Canada
You have to be careful when you go for an aftermarket exhaust, only a few are any good. An alternative is the 993 system that can somewhat be adapted to the 964, but it will take some work.
Pro
Joined: Jun 2009
Posts: 552
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From: Oregon
I went single after listening to every sound file I could find on the web - I just liked the sound of the pulses coming out of the single outlet better than dual, but this is purely subjective of course.
Make sure and listen to both styles and go from there IMHO.
Make sure and listen to both styles and go from there IMHO.
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From: Philly Area ----- George Washington took a dump in my backyard!
I, too, had a DRONE, but I added a baffle to one side for the street, then remove it for the track. The baffle was well worth it since I like the look of the dual exhaust.
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Instructor
Joined: Oct 2010
Posts: 137
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From: Brisbane
this is the fabspeed system i am currently using on my 964 3.6 engined 911SC
http://www.youtube.com/watch?v=TX3jicn9X-w
just a ****ty phone vid (sounds tinnier than it does in person) but it really does have a nice note. i myself have not yet done it but others with the same exhaust simply have a baffle in one of the outlets to block it off; apart from eliminating any drone it picks up some torque for those hillclimbs..
http://www.youtube.com/watch?v=TX3jicn9X-w
just a ****ty phone vid (sounds tinnier than it does in person) but it really does have a nice note. i myself have not yet done it but others with the same exhaust simply have a baffle in one of the outlets to block it off; apart from eliminating any drone it picks up some torque for those hillclimbs..
Instructor
Joined: Apr 2011
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From: London
It is a matter of preferences though so definitely research it.
Three Wheelin'
Joined: Jun 2006
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From: Raleigh, NC
+1. I was just at a Rennlist 964 meet here in (near) London over the weekend, and IMHO the single exhausts, in particular a couple of Rennlisters with the Cup pipes, sounded much better than mine... for a fraction of the cost It is a matter of preferences though so definitely research it.
It is a matter of preferences though so definitely research it.
