UPDATE ON POST 2 !!!!!!!

Is it possible he might have tested the Dynomax with baffles and not this one?

If you want stock quiet this will be for you. If you want live able quiet the double magnaflow will do the job.

I'm not sure how restrictive or not this is. But it basically works like a cutout. So if a cutout is not restrictive then I dont see how this will be.

As for normal driving back pressure information etc... I dont have that data info. But if anyone is in the area with tuning abilities your welcome to datalog my car.

 

Well it does take force to open the valve and it isnt straight through so its not as good as a cutout or even a straight through muffler.

 

Its not going to be exactly like a straight pipe or cutout but damn close in my opinion. Besides I'll be glad to give up 3-5 whp for absolute silence. This is just a preference thing.

Also the internal is straight through but just offset. Straight through meaning no tapers or chambers. But if your referring to the offset style vs straight style then that shouldn't really make any more difference than the curve around the axles that almost all catbacks have.

 

Update:

I ordered the smaller displacement motor version to test out.

Rattling noise fixed. It was caused by the lower portion of the plate but in the picture the upper smaller half rubbing on the pipe. It can be fixed by filing it a little or slightly bending the plate out.



At the moment I have it installed on my car with a ghetto job. Its embarrassing but its temporary until I receive the exhaust tubing and a nice exhaust tip. But for now, its a 45 degree bend mild steel intercooler pipe from a mustang 01 Cobra supercharger kit and an coat hanger.





I did some more driving its nice and stock quiet cruising and low throttle (vacuum) acceleration. The sound linearly increases as you apply more throttle or approach 0 vacuum /start to boost. So far I've only driven it up to 50 mph and its nice and quiet at those speeds. Its not really that much rpm activated as it is load and throttle. So accelerate slow your in stock exhaust territory, when you boost and your opening up the exhaust note.

 

For. The. Win.

I'm glad you've found something that makes you happy. You've done a lot of R&D in this area, and I'm sure it's underappreciated. Good work.

 

I was looking at this trying to figure out why it had an extra tiny inlet!! "This guy is serious about his wastegate", I thought for a moment.

 

I may have missed it but is this the only muffler/resonater you have now? I might get one of these also since it looks more stock than a round can.

 

Thank you! This was actually one of my first thoughts about making a quiet setup but no one really offered it and I dont have a welding machine to make one.



No I dont have any resonators or other mufflers with my current setup. I have sold the double magnaflow setup last year.

My current Setup was Cobb downpipe > Buschur High Flow cat > Buschur Magnaflow catback.

Currently now I replaced the Buschur Magnaflow muffler with this Ghetto rigged DynoMax VT muffler. So its setup up as follows : Cobb Downipe > Buschur HFC > Buschur Intermediate pipe (from catback) > Dynomax VT muffler with ghetto tip.

However I think I will still make the same 6" muffler testpipe to replace the High Flow cat. I dont really like running a cat because it kind of feels like its robbing power in the upper rpm range. Also the 6" muffler setup in the center was much quieter than running this cat.

 

So the smaller displacement muffler is the one to get? Are you also going to test the bigger displacement muffler?

 

Wait a little bit. Let me get the other muffler as well and see which one is better for our car before you spend the money.

There are 2 versions of this muffler. The up to 4.0L and the more than 4.0L. Currently I have the 4.0L or larger displacement version of the muffler.

And yes I already placed an order for the smaller displacement version. Its currently shipping and should be here tomorrow or Friday.

 

Cool. Thanks for doing this. If you ever go to a meet I want to hear this

 

Your welcome. I'm just glad that more people are wanting a quieter setup. At least I'm not crazy. And I got one friend with a 2001.5 S4 wagon that used to be in love with loud exhausts but now I converted him to the world of quiet.




Honestly I dont really like the color of the metal. They say its stainless steel, but the case looks sort of like aluminized steel. Maybe the case is coated or something... I'll probably paint it black or something.

 

Mine is actually pretty quiet when cruising on the highway I'm just looking for different options. I have 2 5" diameter mufflers and 1 resonator so I'm sure its pretty heavy but it does the job.

 

sound clips would be cool.

varex is a nice muffler, but very very pricey for just a muffler.

 

I'll get that going once I get a camera.

Also keep in mind although I did a WOT pull to see how it sounds. I havent done any real testing to see if there is any power difference. I cant really dyno, but I check to see if boost changes etc...