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18" Magnaflow installed today; have questions

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Old 07-25-2009, 09:07 PM
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18" Magnaflow installed today; have questions

Just got an 18" Magnaflow muffler installed today with a custom tip for $200. (For those that responded to my previous post about dual exhausts, I kept it stock and just slipped a tip on).

I have a 3.4L V6. The entire car is stock, except for the muffler which I added on.

I already checked the soundbyte page. I love how it's louder and deeper than the stock muffler (well of course...), but my 18" Magnaflow muffler didn't sound like the one posted on that website. It has a nice bass note, but sounds very ricey and it's very loud in the cabin and drones horribly at highway speeds. (I want my truck to sound like a truck, not an oversized riced out Honda Civic. Please save the "get a V8 then" and "it's going to sound ricey because it is one" comments for another thread). Upon paying for the installation, the mechanic said if I didn't like the sound, I could just bring it back and swap it out for another muffler, free of charge.

I'm considering either the Flowmaster 40 series or Flowmaster 50 SUV. If you have input, personal experience, etc. on either of these mufflers, please let me know. I know the 40 is very loud as that's what everyone claims, but is it loud in the cabin and is the drone noticeable? How about sound at low RPMs and sound at high RPMs? What about the Flowmaster 50? Is it quiet in the cab, but does it still produce a growl?

Thanks
Old 07-25-2009, 09:20 PM
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ive ran a 40 series on several vehicles.. they are a little loud, but i like to hear my car so i know if its running alright. i bet a 50 series would be a little less loud, more on the bassy..
Old 07-26-2009, 12:04 AM
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if you just got it installed give it time that packing has to settle and stuff i was disappointed when i got mine installed but after a few weeks it sounded much better
Old 07-26-2009, 12:51 AM
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Originally Posted by Elton
if you just got it installed give it time that packing has to settle and stuff i was disappointed when i got mine installed but after a few weeks it sounded much better

Is yours loud inside the cabin? This is actually my first truck and first time putting mods on so I don't know what to expect. All I know is that it's loud in the cabin and it sounds like my friend's riced out Civic. It does, however, sound pleasant on the outside, but the drone in the cabin is kind of ridiculous because I have to yell over the muffler to talk to the person right next to me. Of course, I could go 24" or the Flowmaster 50 series, but going 24" Magnaflow would be just a bit louder than stock? I still want that low end growl and high end roar, but just without it being too loud in the cab.
Old 07-26-2009, 01:24 AM
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I have a flowmaster 40 on my 2.7L. It' sounds a little ricey when I draw out the gears a little, like when shifting around 4k rpms. It still drones at highway speeds, but around the city and at idle, it sounds like a truck truck. I like it a lot, and get a lot of compliments.

It may sound better with the 3.4L, not sure. I have some video to show how loud it is, I just haven't really cared enough to load it up.

Last edited by Rudy97; 07-26-2009 at 01:28 AM.
Old 07-26-2009, 01:55 AM
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have you done the deckplate and isr mod ? that makes it sound awesome too
Old 07-26-2009, 06:17 AM
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I went thru the same thing. It did mellow out a bit after a couple days. At times it seems ricey but Im getting used to it. The initial shock of the sound was tough. I was very disappointed for a day or two but I really think it does mellow after a bit of use.
Old 07-26-2009, 06:47 AM
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I went with the 50 series flowmaster for my 2.7 after my gibson rusted out. I didnt want that drone that you speak of and I have been satisfied with it since day 1. My opinion is to stick with the 50 series. You wont be disappointed.
Old 07-26-2009, 08:37 AM
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[quote=Rudy97;51190932]I have a flowmaster 40 on my 2.7L. quote]

Can you pm me info on your exhaust setup? I'm looking to get one on my 2.7L as well, but have no idea where to start. TIA.
Old 07-26-2009, 08:59 AM
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http://www.carreview.com/mfr/flowmas...5_2872crx.aspx

As for fuel economy gains, I haven't had it on long enough to give a reliable report, but I'd guess that as with most free-flowing mufflers, it'll be 1-2 mpg. And for power differences, I didn't dyno the truck before or after, but I can say for sure that it is quicker to the redline under acceleration (quicker even than with just the intake alone), and combined with the Airaid intake I installed a couple of weeks ago, total RPM drop at 75 mph cruise in 5th gear (vs stock) was about 450 rpm. That should equal a very noticeable highway miles per gallon increase.
Anybody notice RPMs drop with the deckplate? That means more MPG!
Old 07-26-2009, 11:35 AM
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Originally Posted by jimig
I went with the 50 series flowmaster for my 2.7 after my gibson rusted out. I didnt want that drone that you speak of and I have been satisfied with it since day 1. My opinion is to stick with the 50 series. You wont be disappointed.
Which model should I look into i.e. 50 SUV, 50 Delta Flow, etc.?
Old 07-26-2009, 06:31 PM
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give it sometime and see how it sounds in a few weeks
Old 07-26-2009, 07:20 PM
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flowmaster 50 on mine...sounds nice, deeper rumble but noticable. Its not bad at highway speeds and it dosen't sound ricey....I hate ricey. My .02
Old 07-26-2009, 07:31 PM
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Originally Posted by Yota Runner
flowmaster 50 on mine...sounds nice, deeper rumble but noticable. Its not bad at highway speeds and it dosen't sound ricey....I hate ricey. My .02
Delta Flow or SUV series? I like growling at low RPMs and minimal sounds inside. Is that what you get?
Old 07-26-2009, 08:25 PM
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Originally Posted by undergroundthry
Of course, I could go 24" or the Flowmaster 50 series, but going 24" Magnaflow would be just a bit louder than stock? I still want that low end growl and high end roar, but just without it being too loud in the cab.
The 24" gives you a lot of growl and high-end roar, but it still resonates in the cab.
Old 07-26-2009, 09:11 PM
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How much louder than the 18"? I'm actually getting used to the resonance in the cab, but still a bit loud for my preference. Would it quiet down after a bit?
Old 07-30-2009, 03:53 PM
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Got the Flowmaster 50 Delta Flow to replace my Magnaflow 18" and I love it. It's much quieter in the cabin, but I can still hear it and it still gives me the roar of the engine I'm looking for. Up next... headers.

Side note: My mechanic told me my 4Runner has 2 cats and that I need a special cat since I live in California. Could someone elaborate on this? I thought all 3rd gen 4Runners only had 1 cat?
Old 07-30-2009, 06:58 PM
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1999 haha. Yes I will try and put a clip of my exhaust once I find my camera.
Old 07-30-2009, 08:08 PM
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Originally Posted by Buhundred
What year is your 4Runner? All 3rd gen 4Runners 2000+ had dual cats. If your's is from before 2000 and it has dual cats then your truck originally came from CA. Single cats were on 4Runners from 1996-1999 that were from the other 49 states. By the way, could you put a clip of your exhaust? I wanna hear what it sounds like.
I've got a 2000 with a single cat. Sure about that info?
Old 07-30-2009, 08:14 PM
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You need to let it break in, the magnaflows need a little time to break in. I had the 14 inch installed on my 3.4 and it was awful loud in the cab after a couple weeks its perfect. Perfect tone outside and you only really hear it on the inside when im really on it. Stick with the magnaflow over the flowmaster


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