Looking to change my exhaust to either Milltek, APR or Stasis. I am looking for an exhaust that sounds nice but not too loud and does not drone at hwy speeds. I know APR and Milltek are full systems and Stasis is a catback. The price is more for full back but I hope the sound is not loud like when you see a Honda Civic modified.

Any feedback from people who have installed any of these exhaust systems?

Cheers!

 

PM sent.

 

Please let us know what you eventually went with and why. I am curious as I am also looking for a little more "noise". Based on chip discussions I think the exhaust and air intake are going to be my only mods for a few years.

Nathan...

 

Have you checked out this guy's videos? He has videos and DB measurements of each of the exhausts you're considering.

http://www.youtube.com/user/nbrown73

 

Hi John,

Thanks for the link. After doing my research, I think I am leaning towards a Milltek.

 

Have you considered AWE + resonated DP's?

I have the AWE with resonated downpipes. I am very happy with the decisions and drone is very minimal.

 

I have a Milltek (non-resonated) on my car and love it!

 

seems like the B8 guys don't check for exhaust design...they just buy based on sound. Weird.

I'd be pretty keen to make sure the exhaust was of adequate diameter to handle the flow a blown 3.0T can produce. I'd also want to know if there's an x-pipe or an h-pipe or no crossover at all. I'd also like to know what kind of mufflers are they...are they a perforated core, straight through design? Or are they a baffled design to help sound (at the potential expense of flow). I'd also like to know what the tips look like.

Sound is certainly important, but so are the performance dynamics. I mean if you end up tuning the car, and doing a cat mod...what's the point if you have an exhaust that is CHOKING the system and killing performance?

Milltek's B6/7 S4, B7 RS4 and B8 S5 exhaust systems are terribly designed. They sounded good, but they choke performance. Brutal design. I'd love to know what they did with the B8 system...after the beating they took in the B6/7 world, I sure hope they learned their lesson and did some frigging MATH for a change and found someone with a flow bench.

 

Sakimano,

Are you an engineer? If so, what are you thoughts on the APR RSC system?

 

I'm not an engineer...just a car nerd that has seen this conversation play out in 3 generations of Audi S4s and 2 generations of Audi RS4s so I've learned a few important things.

APR's system..what's the design? diameter? crossover?

Throw up a photo. I think their mufflers use some weird baffling design (the RSC) to reduce drone, but I don't know how it affects flow. Again, nobody seems to have done any homework on this topic...just lots of subjective sound opinions (typical in the early stages of modding).

I do know that APR's B6/7 S4 exhaust was 2.25" and I believe had no crossover...which was horrible for a cross-plane V8 that revs to 7250 RPM and has exhaust pulses from 4.2L of displacement. One company figured out that 2.50" and an x-pipe up as close to the engine as possible (on the catback) was optimal, and they've cleaned up in the B6/7 world as their system is hands down the best performer. Has APR gotten smarter since then? Hard to say. Some of their recent products don't seem to indicate that they have!

Considering that on the B8 S4, an EATON TVS1320 can flow about 750-800 CFM of air, and the car can make upwards of 450-475hp with tuning and exhaust mods, I'd really want to check into the exhaust (and 'high flow cats) that someone is putting on the car to make sure it's not a restriction on the exhaust side that is hurting what that great supercharger is doing on the other side.