So what are my exhaust options?
1st Gear
Joined: Oct 2007
Posts: 337
From:
Straight 2.5" w/euro tip here. Cost me $120. Resonator and muffler add to much weight. Maybe I'll see you around Petaluma! Listen to it here http://vids.myspace.com/index.cfm?fu...deoID=34942112
yeah... all that muffler weight is what holds the 12v back... add the resonator and it's a regular anchor to performance...
yah...
Site Moderator
Joined: Sep 2005
Posts: 13,664
The stock resonator is an anchor for sure. But, resonators that come on aftermarket exhausts and one's that are sold seperately are a fraction of the weight of the stock one. DD's sound too poppy/sputtery without a res. imo, and they probably arent restrictive in any measureable way other than a little added weight which you are ulikey to notice.
Question? Stock S4's come with high flow CATs, like a screen door, you can see through it. Yet there are those who want to upgrade to them anyway. Is this A4 owners or a larger surface area CAT upgrade.
Site Moderator
Joined: Sep 2005
Posts: 13,664
They arent "high flow".. The catalyst element might not be as "concentrated" due to the fact that on an S4, the cats only have exhaust gas from 3 cyl's to clean/cat. Just because it's an S4 doesnt mean it is imune to OBDII and EPA standards. If Audi claims their stock cats are "high flow" or performance related in any way its news to me and a big surprise. Do you have a pic of this? An S4 should have as much or more to gain from replacing the cats w/ straight pipes.
Last edited by onepoint8tee; Aug 4, 2008 at 09:36 PM.
3rd Gear
Joined: Oct 2003
Posts: 1,853
From: United States
Yah I hate Cats all they do is eat and sleep they dont even fetch a friggin ball. im a horse guy myself.
4th Gear
Joined: Mar 2006
Posts: 3,794
From: Home of the Yankees
Go vibrant
If you remove the res the interior drone will become unbearable, plus the exhaust will be too loud. I replaced it with a smaller, much lighter, res from vibrant. It's still freeflowing with almost no drone. Now the exhaust sounds almost stock at idle but definitely aftermarket at even the slightest throttle. Dare I say it almost R32-ish. I just love the suttle barks and backfires on downshifts.
http://vibrantperformance.com/catalo...1021_1033_1055
http://vibrantperformance.com/catalo...1021_1033_1055
Last edited by Trey25; Aug 4, 2008 at 10:19 PM.
When I hacked off my stock 2K S4 resonator and muffler I noted I could simply see it was just a mesh screen, not a glass pack or bead. Apon discussion with both an exhaust shop and my Audi only mech. It was stated that those were high flow cats and they came stock. Oh and I passed CA smog with 9ppm HC's. APR 91OCT. http://vids.myspace.com/index.cfm?fu...deoID=34942112
Last edited by DraxeofDclan; Aug 4, 2008 at 10:35 PM.
2nd Gear
Joined: May 2007
Posts: 781
From: Columbus, OH
Magnaflow 14816 muffler w/out the res. Sounds awesome!!!
Here is a clip from my A4 1.8T when I had it:
http://www.youtube.com/watch?v=KCKfQgACBJA
Josh
Here is a clip from my A4 1.8T when I had it:
http://www.youtube.com/watch?v=KCKfQgACBJA
Josh
2nd Gear
Joined: May 2007
Posts: 781
From: Columbus, OH
When I hacked off my stock 2K S4 resonator and muffler I noted I could simply see it was just a mesh screen, not a glass pack or bead. Apon discussion with both an exhaust shop and my Audi only mech. It was stated that those were high flow cats and they came stock. Oh and I passed CA smog with 9ppm HC's. APR 91OCT. http://vids.myspace.com/index.cfm?fu...deoID=34942112
