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Just checked the Mazdaspeed site - they show two exhausts: a SINGLE muffler sport exhaust and a DUAL muffler sport exhaust. Anybody know the difference in performance and noise between these two?
I waded through the exhaust sticky, but didn't see anything.
The goal is power (yep, know it's only a couple of HP), and low-medium noise at cruise. Noise at high rpm OK. Car has less than 2000 mi, so keeping the warranty is a good thing.
Was thinking of doing cold air intake/sport exhaust together.
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I have the dual on my 05 AT. From my understanding the dual is louder and has a different sound than the single, but i've never heard the single so i don't know. Under light throttle it has kind of a rumble. It can really scream at higher rpms. Only annoyance I've noticed is kind of a drone when cruising around 70mph or so. But if you have a manual your rpms would probably be different, so your drone might be at a different speed.
Overall I am very happy with the exhaust. Seemed to provide a bit of a power gain, but that is probably more psychological than anything.
Search is your friend and I won't be the last person to tell you that.
On that note, I have the single can. It's quiet in normal driving but howls like a F355 when you're on it. Verrrrrry nice. no drone. Thinking of pairing it with a supercat but worried I'll lose the elegant sound.
i got the duel, i love it. sounds stock at an idle. and screams when u want it to. i have not noticed any drone realy. (my last car was an srt4 with strait pipes) so my opinion could differ.
I used to have the dual can exhaust which is the second version of the MS Exhaust... To be honest i'm really not a fan of their exhausts, too quiet and the tips aren't really that attractive. not to mention the first version didn't do squat.... If you have the money I would dish out and get the B&B exhaust, I love it!!! or try racingbeat, Corksport, Borla....
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05 Winning Blue 6MT- Grand Touring Package- Pettit Racing Stage II Forced Induction System- Interceptor-X w/ EMS- Magnaflow Catback Exhaust- Unorthodox Underdrive Pullies- JDM Clear Corners- MAZDASPEED Strut Bar- Racing Beat Front and Rear Sway Bars
YAY its a lot i kno, suck it all in. your in the power now. your in the power
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[SIGPIC][/SIGPIC]------------------------------------------------
04==VR==Rx8 GT==6speed==rx8store midpipe==Mazdaspeed dualcanister cat-back==8000k HIDs==15% tint allaround==vodoo shiftknob==(soon to have nitrous)
"40% of the time, it works everytime"
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[SIGPIC][/SIGPIC]------------------------------------------------
04==VR==Rx8 GT==6speed==rx8store midpipe==Mazdaspeed dualcanister cat-back==8000k HIDs==15% tint allaround==vodoo shiftknob==(soon to have nitrous)
"40% of the time, it works everytime"
a lot of cool dudes will answer your questions accordingly 
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