02whitemaximase

iTrader: (38)

I have a 3.5 with newly installed obx headers, stock main cat and megan catback. The exhaust sounds great except for an annoying drone from 2-2500 rpms which means holding highway speed at 65-75 is annoying. Here are the options:

1. Remove megan resonator and replace with one magnaflow 22" x 4" round resonator.

2. Remove megan precat and replace with two magnaflow 14" x 4" round resonators. I am leaning toward having two seperate resonators because it may create enough breakup in the exhaust frequencies bouncing down the piping.

3. Reomve megan resonator and replace with magnaflow 27" x 6" resonator. Only problem with this is that the resonator will hand down lower due to the big diameter.

4. Remove megan axle back section and replace with oem axle back. I feel like power ma be lost and I love the stainless look of the megan.

I am open to ideas.

T_Behr904

I'd try #1 first, and if it still drones too much for you, then include #2 with it.

02whitemaximase

iTrader: (38)

cant do #1 then #2. There is only enough room to fit either one longer resonator or 2 14" resonators. By the way Im here in jville too. What part of town do you live in?

T_Behr904

Ok, gotcha... Perhaps #1 then.

I'm on the southside area of town, and yourself?

02whitemaximase

iTrader: (38)

mandarin and work downtown. would love meet a fellow orger and see the car.

T_Behr904

Check out the link in my sig to North Florida Maxima's. We haven't done a meet lately, but that's where our info gets posted up when we do.

TunerMaxima3000

iTrader: (4)

If it's 2.5", the OEM G35 sedan muffler will work, it's 2.5" and will take out the bulk of that noise without killing everything. It's going to cut power a touch, but shouldn't be bad, especially considering that Megan system isn't even 2.5", it's a bit less. the G muffler is true 2.5" IIRC.

If you want to retain no power loss, your best bet is slapping the largest, longest resonator you can fit in the stock location. Leave the rest alone. But it's still going to be loud, just may help some drone.

The Megan axel back is loud, everyone says so. the only way you're going to FIX this is to get a different muffler that isn't so loud.
Then if you still find drone, you need to slap a big resonator in there.

Now, the precats you have are causing a lot of this too, no doubt. Stock or close to stock will fix that portion of the drone.

In short, you have a lot of compounding issues for noise. Obviously by your selections, loud isn't a problem so much for you. Well loud and drone kind of go hand in hand, the only system that does a good job lowering drone and keeping power and grunt is the Cattman. Everything else is a gamble, and kind of based on everyone's opinions of 'bad', 'loud', and 'drone'. Most guys who do a custom set up make themselves like it cause they end up doing so much trying to save money LOL so take that with a grain of salt.

Chris Gregg

iTrader: (59)

I suggest #2. However, I'll post my suggestion 5: remove Megan muffler and install 2.5" in/out magnaflow muffler and pick your own tips.

Chris Gregg

iTrader: (59)

Of course the "tuning" system we discussed sounds like fun too!! ;-)

02whitemaximase

iTrader: (38)

In response to tuner, I don't have precats. I was happy with the volume when it was only my catback. The addition of headers or should I say the subtraction of precats that caused the drone.

clintb3astwood

iTrader: (10)

Take off Megan, get cattman :3, problem solved lol.

TunerMaxima3000

iTrader: (4)

That's info to include in your OP, for future consideration.

Also, in option #2, you mention MEGAN PRE-CATS. Perhaps I'm just getting confused?

02whitemaximase

iTrader: (38)

I did say I have obx headers, that clearly means no precats and I meant to say megan resonator. Will fix but can't from a phone.

Even some people with the cattman three inch are complaining about a drone.

TunerMaxima3000

iTrader: (4)

If the headers were the only addition that caused drone, I'd say try a big **** sonofabishing resonator on it. Don't cheap out (Megan), get a good resonator.

And yah, headers implies no precats, but you mentioned precat and also putting 2 resonators in PLACE of the precats, so that is justifiably confusing. All good, cleared up now, just resonate, resonate!

ShocknAwe

iTrader: (3)

Every exhaust system will sound a little different on every car because there are tiny differences in every system that affects noise such as carbon build-up or tiny leaks you dont know you have. Every exhaust also has a drone at different RPM's. If you don't want drone then don't mess with your exhaust. Nissan designed it to be quiet if thats what you want. Its like upgrading your suspension and complaining about stiffness after a long drive.

ranmas2004

iTrader: (2)

Adding a bigger resonator will help, but ultimately any aftermarket exhaust is going to be louder and have some drone. I have the Cattman 3" exhaust and there is very very little drone due to that big azz resonator, its pretty quiet for a 3" exhaust! I don't know if there is a way to completely remove drone on any aftermarket exhuast though. There is always a tradeoff.

Xpcgamer

iTrader: (5)

I got Resonated Main cat delete pipe-Cattman 2.5 B Pipe and 40 Series Magnaflow. No drone at all. May not be the case when I gut my pre cats thou.

TDMIIG

I have read good things about the Dynomax VT series muffler. It has a valve in it like our stock muffler so at idle and cruising it is pretty quiet but when the valve is open it is a straight through muffler. It is stainless steel and about 100 bucks. Probably the most drastic effect on sound for your dollar. You'd need new tip(s) and would need to have it welded in but you'd need that for a resonator as well. Also, I believe for your car you'd want the version with the tougher spring (engines over 4.0L model I believe) as they have two different versions and that seems to be better suited for the Maxima. Eventually I'm going to get a catback and this is the muffler I plan on using.

Ryan00ss

Im having the same issue! I have hotshot headers and a greddy catback with a test pipe. Im thinking about just selling the whole setup and replacing it with a quieter catback. The drone is annoying on my highway drives

CMax03

iTrader: (3)

None of the above it's that puny 14" megan muffler! Purchace yourself a Borla 40348 muffler or Magnaflow 12258 muffler:http://www.magnaflow.com/02product/s...e=main&id=9346
and 2.5" x 4" round x 22"L Magnaflow 10436: http://www.magnaflow.com/02product/s...e=main&id=9284
Or 2.5" Glasspack: http://www.magnaflow.com/02product/d...rtnumber=18146

02whitemaximase

iTrader: (38)

Thanks for the feedback. The exhaust shop owner told me that most of the drone is due to the cheap "Chinese" muffler. I am actually leaning toward getting a g35 sedan muffler which has a 2.5 inlet and maybe throwing some new tips on it. I will miss the all stainless look of the megan muffler but at least would be able to comfortably travel down the highway on long trips.

UGAd13

cheap way to reduce drone