So you have pics of the inside AND after modification right? Wondering what you did to reduce the flow restriction, and of course how it sounds and gains/etc. Enough detail for us and you will get reps from me. :tup:

I will post up full detail when done dude NP

Im sure it is a chambered muffler and those are very restrictive but help keep the noise down.

Thats my guess too, I'm figuring a perforated inlet with fiber packing and then some chambers to cut out the noise. Probably a drop in tube size somewhere in there as well, but maybe not.. wait and see.

Pics for the pre gut, should sound good when this is gutted out, will weigh it and post sound clips, also return to dyno.
Enjoy my fellow Doctors.

http://i116.photobucket.com/albums/o...Z/IMG_6326.jpg
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http://i116.photobucket.com/albums/o...Z/IMG_6327.jpg
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Nice! +1 for the pics.

Now I'm tempted to tear apart my OEM Nismo muffler.

that is one restrictive biatch.

Daleks Dont do that... I want one and we can do a deal....... ;-)

Zsteve , I can see a whole lot of peeps getting cuttin and welding...lol the dyno and videos will shwo up a lot I feel

If you are going to gut it out I would just do a 90 degree bend pipe from each intrance to its perspective exit and cut out the walls, may be drill a few holes in the new pipes.

Prob do just that, I may run it as an open chamber, not decided, will have to trial sound, need to get a plasma cutter set up ;-) good times

I would think that if you dont run a pipe for it then the air will just bounce around inside and you will still get some restriction from it and the flow inside would be all jumbled. But dont quote me on that.

Not sure, most of my smaller banger muffler where just 'open' can, we will see I guess, I dont mind playing with stuff

Haha, you beat me to this. I was going to eventually tackle gutting the stock muffler until I achieved the same sound as the washer mod. Gutted the stock muffler on the Evo, and that actually produced 5-10 WHP! :bowrofl:

There will be a bit of turbulence, but exhaust flow takes the path of least resistance, so it really won't matter much to overall flow.

Ill see how she runs, I did run it with open X pipes once and it was def quicker but dam, with test pipes, ultra loud

thx for the reps guys