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Which sounds, performs the best in your opinion, D&D mufflers or Arlen Ness Thunder Slip-On Muffler Kit ?

I plan on using Loydz air filter and VFC-III tuner with one of these.

I need to richen it up a bit since they run hot, hopefully the tuner will help.

Will backfire or decel popping be a problem?

Thanks!
 

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No need for the VFC III if you unplug the O2 sensors - I fancy the D&D's. I think you will get some decel popping any way you decide to go, just depends.
 

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Between those two options, the looks are different, the price is different and so is the sound. That's a personal choice.
Haven't yet seen a dyno run with the Thunder sticks so, hard to say which will perform better.
Popping is always a problem but Lloydz IAV helps that a lot. So does a good dyno tune.
 

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I could'nt be any happier with the way my D&Ds look and sound....sound just right (for me) around town low and quiet - hit it hard and they roar deep and loud.
 

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I would go with the Thunders! But thats because thats what I have and I think they are sweet. But you are going to need either a flash or a fuel management, unplugging the O2's mainly richens up low rpm and idle and will not run the bike as well as a flash or a tuner when you replace both intake and exhaust.
 

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Discussion Starter #7 (Edited)
I would go with the Thunders! But thats because thats what I have and I think they are sweet. But you are going to need either a flash or a fuel management, unplugging the O2's mainly richens up low rpm and idle and will not run the bike as well as a flash or a tuner when you replace both intake and exhaust.
I agree that fuel management will be needed when replacing air filter and the exhaust.

If it wouldn't be too much trouble, could you post the sound of thunder sticks on your bike, thanks.

Also, are they loud all the time or only when you accelerate hard?

It would be nice to hear the sound at idle and as you're driving if that's possible thanks.
 

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I agree that fuel management will be needed when replacing air filter and the exhaust.

If it wouldn't be too much trouble, could you post the sound of thunder sticks on your bike, thanks.

Also, are they loud all the time or only when you accelerate hard?

It would be nice to hear the sound at idle and as you're driving if that's possible thanks.
Search his other threads. He already posted somewhere.
 

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Discussion Starter #11

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They are loud enough no one will mistake you for a lawn mower like the stock ones :ltr:. They have a nice roar when you get heavy on the throttle but are not headache inducing loud when cruising.

I would describe them as a good deep rumble at idle/cruise and a raucous bark when you twist the throttle.

I do get some popping at high rpm during engine braking or when I drop the throttle too soon while shifting, but nothing excessive and if I am just cruising and not driving aggressively it doesnt really pop. Installed the IAV same time as exhaust so not sure how it would of been without IAV but I am happy how it is, and nope my O2's have never been disconnected, I see no reason to disconnect them.
 
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