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Discussion Starter #1
For a while now I've been wanting a new muffler on my 05 Nismo and I've decided to go with a Flowmaster 40 series..
I just had a question, would a single in and dual out change the sound at all? Compared to just a single in single out?
I'm getting it installed tomorrow but I'm unsure if I want to pay the extra $ for dual out.

Thanks for any help and comments.
 

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For a while now I've been wanting a new muffler on my 05 Nismo and I've decided to go with a Flowmaster 40 series..
I just had a question, would a single in and dual out change the sound at all? Compared to just a single in single out?
I'm getting it installed tomorrow but I'm unsure if I want to pay the extra $ for dual out.

Thanks for any help and comments.
what 40 series? dont get the original. you will sound like a ricer
 

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Discussion Starter #3
what 40 series? dont get the original. you will sound like a ricer
That's what I thought.. my muffler guy reccommended it though and somehow convinced me but I originally wanted the 5 x 8 x 14in Magnaflow.. but he said Magnaflows wouldn't be that much louder than stock..
Suggestions?
 

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That's what I thought.. my muffler guy reccommended it though and somehow convinced me but I originally wanted the 5 x 8 x 14in Magnaflow.. but he said Magnaflows wouldn't be that much louder than stock..
Suggestions?
super 44:)
 

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Discussion Starter #5

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Discussion Starter #8
nope thats the original 40
I think I'm gonna go for 40 deltaflow.. but I wanna make sure I'm getting that and not the original 40 series.. is there a way to know that it's deltaflow? Does it say on the box? On the actual muffler?
 

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I think I'm gonna go for 40 deltaflow.. but I wanna make sure I'm getting that and not the original 40 series.. is there a way to know that it's deltaflow? Does it say on the box? On the actual muffler?
it will deffinatly say on the box, as for the muffler. i cant remember when i put mine in. it may.
 

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Discussion Starter #10
Think that 40 delta will have little to no ricer sound? The dumb ricer sound is what I'm afriad of, but when I go between getting MagnaFlow or Flowmaster I'm always recommended/convinced to get Flowmaster. I originally was against Flowmaster because I thought it had more of a ricer sound.
 

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Think that 40 delta will have little to no ricer sound? The dumb ricer sound is what I'm afriad of, but when I go between getting MagnaFlow or Flowmaster I'm always recommended/convinced to get Flowmaster. I originally was against Flowmaster because I thought it had more of a ricer sound.
i think nitewulfs sounds about better than mine. hes got the delta and ive got a super 44 the 44 has a nice grumble. you wont be dissapointed with the delta
 

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Discussion Starter #12
i think nitewulfs sounds about better than mine. hes got the delta and ive got a super 44 the 44 has a nice grumble. you wont be dissapointed with the delta
Okay great.. do you have a full catback, or what?
And how much did it cost ya?

I think my guy said $160 for the Flowmaster installed.
 

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Okay great.. do you have a full catback, or what?
And how much did it cost ya?

I think my guy said $160 for the Flowmaster installed.
i have the nismo system that comes with the bigger y pipe. i cut the nismo muffler off and welded a flowy on
 

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I really dont think the flowmaster will be that ricey on your v6. Depends on the piping. Just dont go too big.

On my 4 cylinder i had the 40 series flowmaster and then found out it was a knock off, but really the same exact thing. I had something break inside the flowmaster and ended up trying a magnaflow. All I can say is mine hasn't completely broken in yet, but its definitely not as loud as the flowmaster. Its a lot quieter in the low revs but still is there when you step on it. I will also say that the magnaflow has practically no resonance so thats why i also think its not as loud inside the cab. I still havent had someone drive by me so i can here it yet. Remember that I have a 4 cylinder with headers and an intake though, anything will sound better on a V6.

My main comparison will be this. The magnaflow will not be as loud inside, it has a more low smooth growl, but really isnt that loud. Thats the only reason I dont like it on my 4 cylinder. Now, the flowmaster is more of a crackly roar that I actually liked better. It was a lot louder with resonance in the cab as well which I actually liked. However, it did sound a tad ricey once I past like 4,000RPM with the manual in my 4 cylinder. Then there is always that flow/backpressure issue that everyone talks about where to me it looks like a magnaflow flows a lot better than a flowmaster, just by looking through them and seeing the design. So flowmaster more backpressure and low end/ magnaflow more flow and top end. I really couldnt tell the difference between just swapping out the two different mufflers as far as performance.

Now just remember this is my very non professional learnings. Just what I have kind of concluded of having both on my 4 cylinder. Im sure on the v6 they'll both sound alright. It depends what you want. The performance gain of any muffler on these trucks is not even going to be noticeable. Maybe noticeable when you change pipe size and the muffler. But really Im assuming were going for just sound like I mostly did on my truck.

SOOOO, for the magnaflow/ flowmaster decison I would say if you want a loud nice sounding aggressive exhaust go for one of the flowmasters. I actually like them that way. If you want a nice smooth sounding low growl with no interior resonance but not that much louder than stock then go with the magnaflow. Hope this somehow helps.

Another tip, your only getting a real flowmaster if it has the flowmaster name stamped next to the weld on the muffler. If thats not there it could still be the same thing, but you definitely have a knock-off and not a genuine flowmaster with the warranty and all that.
 

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LuckyKevin, first of all TheOregonFront has a first gen 3.3 motor so while his input may help you remember the displacement difference between first and second gen trucks.

Secondly I would highly suggest getting rid of the restrictive "Y" pipe that our trucks come with and do a dual in single out muffler.

From my experience and everything I've read on here you will get the most gain going that route.
 

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Discussion Starter #17
Okay 5speed & thanks for all the feedback guys - it really helps. For now I'm just changing the muffler and CAI, once I save up some more I'll trash the restrictive y-pipe.

But, for now, do you guys think there will be much of a sound difference between a single in, dual out and a single in, single out?

Thanks
 

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For a while now I've been wanting a new muffler on my 05 Nismo and I've decided to go with a Flowmaster 40 series..
I just had a question, would a single in and dual out change the sound at all? Compared to just a single in single out?
I'm getting it installed tomorrow but I'm unsure if I want to pay the extra $ for dual out.

Thanks for any help and comments.
I also have an 05 and installed the Flowmasters 50 series SUV using 2.5" piping to include a Flowmaster Y Pipe and it sounds awesome! I have put 60K on this muffler and the sound has deepened over time and in my opinion, this muffler is sounds the best. (of course I'd say that) I have some sound clips that I can post, I just need to figure out where and tag them here.

FYI, I have since installed the NISMO headers and not only have I had a touch of a power increase, I get alittle more "burble" from my exhaust.
 

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Discussion Starter #19
I also have an 05 and installed the Flowmasters 50 series SUV using 2.5" piping to include a Flowmaster Y Pipe and it sounds awesome! I have put 60K on this muffler and the sound has deepened over time and in my opinion, this muffler is sounds the best. (of course I'd say that) I have some sound clips that I can post, I just need to figure out where and tag them here.

FYI, I have since installed the NISMO headers and not only have I had a touch of a power increase, I get alittle more "burble" from my exhaust.
Okay cool - how loud is your 50 series?
I'm going with the 40 Delta Flow and I hope it's not going to be insanely loud, my dealer said the 50 wasn't that much louder than stock.
 

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Okay cool - how loud is your 50 series?
I'm going with the 40 Delta Flow and I hope it's not going to be insanely loud, my dealer said the 50 wasn't that much louder than stock.
My opinion....not true. The 50 Series is considerably louder than stock but much better than the 30 series I had. I forgot to mention, I originally had a 30 series with 3" and it was loud and ricey. I then had the shop replace the 3" for 2.5" and install the 50 series...what a difference! I called Flowmaster and they recommend the 50 series SUV version which is specifically designed for V6 motors. I'll post my clips...what site do you recommend?
 
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