What is the quietest muffler that will not sacrifice performance? Updated?

[sidewayzgt]

So are you saying that if I put 2 high flow resonators after the muffler in the center (almost like bullet mufflers) then it will quiet it down a lot?

You're pretty limited on placement then unless you place the resonators after the axles, I had the same setup as you previously and bought a SSAC twin 2 to quiet the car down. It made a huge difference in terms of being significantly quieter in normal driving but still is loud enough under acceleration to be enjoyable.

The tone sounds much more refined too and volume at highway speeds is significantly improved.

[christianb5s4]

So are you saying that if I put 2 high flow resonators after the muffler in the center (almost like bullet mufflers) then it will quiet it down a lot?

I'd say that's the only viable place since space is tight between the downpipes to the rear axles. FYI on switching to a Twin 2, the way the sections join are not compatible i.e. you can't just buy a rear muffler from a twin 2 and join it to your current twin 1.

Trust me I tried.

[sidewayzgt]

I think I understand. I will buy 2 3” high flow resonators and put them in place where the second muffler would go? Would 12” be ok or are longer ones quieter?

I'd say that's the only viable place since space is tight between the downpipes to the rear axles. FYI on switching to a Twin 2, the way the sections join are not compatible i.e. you can't just buy a rear muffler from a twin 2 and join it to your current twin 1.

Trust me I tried.

[goalieman24]

I think I understand. I will buy 2 3” high flow resonators and put them in place where the second muffler would go? Would 12” be ok or are longer ones quieter?

In theory a longer resonator of the same model should cause a bigger change because of more baffling.

Slightly weird alternative suggestion: a lot of those cheap universal e-bay-special mufflers have "silencers" that bolt into the tip and reduce it down to like an inch or 2. Maybe you could rig something up like that for early morning start ups and then hop out and take it out as soon as you leave the neighborhood?

[sidewayzgt]

Good suggestion but I live in Southern California and the less attention I draw the better. They ticket you for anything over here lol.

In theory a longer resonator of the same model should cause a bigger change because of more baffling.

Slightly weird alternative suggestion: a lot of those cheap universal e-bay-special mufflers have "silencers" that bolt into the tip and reduce it down to like an inch or 2. Maybe you could rig something up like that for early morning start ups and then hop out and take it out as soon as you leave the neighborhood?

[christianb5s4]

I think I understand. I will buy 2 3” high flow resonators and put them in place where the second muffler would go? Would 12” be ok or are longer ones quieter?

It's hard to tell as every brand, length of resonator/muffler, and design will lead to different outcomes. The longer it is the more it will affect volume decreasing as it gets longer.

I feel your pain on wanting to be more more incognito due to being in California, exactly why I switched to a Twin 2.

[sidewayzgt]

Yep, I really do not want to attract attention and I work right by the CHP here in Valencia. I have stock height with 17” BBS Wheels, BBK and roof racks lol. I’m all about the sleeper 👍. If I could have a stock sounding S4 and not sacrifice the power I would.

Anyway, I’m still not totally set on what my final plan is. I have to quiet this thing down ASAP. I know I need to add 2 resonators but I am not set on which ones? I do need to weld them in behind the muffler but the pipes are so close together that they will probably hit each other. Another idea I had was resonator exhaust tips but they are not very long and will probably not quiet it down much. Any other ideas?

Has anybody tried the resonator exhaust tips?

It's hard to tell as every brand, length of resonator/muffler, and design will lead to different outcomes. The longer it is the more it will affect volume decreasing as it gets longer.

I feel your pain on wanting to be more more incognito due to being in California, exactly why I switched to a Twin 2.

[darren p.]

Curious to see what you come up with, please follow up with your results. I have a similar setup and it is too loud (and raspy) but I only have the rear muffler, not the primary one. ASP, true dual 2.25", catless 3" downpipes, no resonoators