Has anyone cut open a OEM 03-06 sedan muffler? I'm trying to figure out where the variable valve is inside the muffler. Thanks.

 

^so thats what you are using it for... I cut a big "U" on the top side of the canister to remove some baffling and I dont remember seeing any valves

 

The muffler looks great. Are you kidding about opening up one of these mufflers?

There should be a spring-loaded valve in the muffler which allows the passenger side exit pipe to flow at ~3500-4000rpms. It idle on a cold day, you see and feel only exhaust coming out the driver's side.

I've done a bit more research regarding these types of mufflers and it appears the design is solely to reduce noise at lower rpms and not to improve lower rpm power as I had orginially thought. The coupe muffler doesn't use a valve either.

I've curious about how the muffler would sound with the valve removed. I don't think it will sound like a coupe, but perhaps a bit more sporty. I've mapped out the inside of the muffler and flow paths using measuring tapes poked into the muffler pipes. I think I have a good idea on where the valve should be based on how the pipes are arranged. I'd rather cut as little as possible of the canister.

 

subscribed.
do you have any pictures?

 

interesting, i never heard about this before, now im gonna check when i leave work lol if you do cut it open post pics please

 

We need an X-ray machine lol

Dave Take tons of pics if you do will be interesting.

 

I'm not sure if this should be in the Exhaust section or not... but I am anxious to see pics.

 

Yeah, im in for pics and results. Also you should do a DIY for this (if you have time)

 

subscribed!! I thought the 03-04 and 05-06 mufflers were both different?

 

The 03-04 are smaller but they "should" have the same internal layout

 

yea i made a thread about this 2 .. i thought i was the only 1 ...

my muffler only blows out from one side...

im not sure how it works.. cuz i rev my engine to 3 - 6k n the passenger side mufflers doesnt blow...

idk... im curious 2..


sub. in

 

This probably won't happen until Saturday. I know there's a valve in there because I've found old thread on some Nico forum where a guy cut into one and posted pics. Of course the pics no longer show up.

 

interestedto see the results!

 

Dave as always you da man!

sub'd for pics and more knowledge.

 

very interesting Dave ... sub'ed for pictures and more info