FREAKINHEAT

Has anyone had experience with a cat delete exhaust system that has no drone? I've searched the site and heard kline, Remus but not many others. My ears are pretty sensitive to the droning noise so If anyone has proven experience with the full exhaust without drone, it would be greatly appreciated.

Carlo_Carrera

In my experience all exhausts on 996TTs drone in the 2200-ish RPM range to varying degrees, even the stock exhaust.

2fcknfst

I have a Kline inconel, the third on the car, and it is most certainly the best to my ailing ears, and that is with test pipes installed.

FREAKINHEAT

Do you happen to know which model Kline?

2fcknfst

Inconel for the 996tt.

alxdgr8

Do you have a K16 or K24 car? K24 drones more...even with the factory exhaust it drones.
I have a K24 (X50) car and have been through a couple.
Fabspeed Max Flo - Way too loud everywhere and terrible 'tone' (ie. it sounds the same whenever wastgates open regardless of RPM)
Milltek - OEM + sound. Slight volume increase with slight drone over stock but boring tone. Didn't see the point of this exhaust over the stock since it didn't sound 'better', just moderately louder.
Kline (S.S) with 200 cell cats - I love the tone, but it still drones pretty bad <3k rpm. I modified mine slightly to add another chamber to decrease the drone but it still wasn't enough. Will need to add Helmholtz resonators which I plan on doing soon. I hope that's enough as I like the exhaust otherwise.

My other options I've considered but haven't done: Europipe - based on reviews you need to get the newest version (single model) or find the older 'quiet' system from when they offered multiple. But still have hesitated because the video sound clips I've heard don't have it sounding as good 'tone-wise' as the Kline. I like the high RPM 'wail' of the Kline whereas the Europipe in all of the videos sounds like it has greater idle rumble sound, but at higher rpm's sound more monotonous instead of musical like the Kline. Sort of akin to the Fabspeed. Lots of this is due to the x-pipe design vs the segregated mufflers (and sometimes a balance pipe) like the stock exhaust/Fabspeed/Milltek/Europipe. But I haven't actually heard one in real life, just my educated guess based on watching many youtube videos and knowing how the Kline in the videos translates to real life and then making those extrapolations to other exhausts in videos.

I'm super sensitive to drone especially living around a bunch of hills and taking my wife and toddler in the car often. In addition to doing acoustics/NVH for a living. Lots of challenges on 911 exhaust since you have no space to work with. It's very easy to get it wrong as many droning systems indicate.

Bernard IV

It's tough to make these cars sound good. I rode in a Kline car and was impressed with it, can't say what exhaust it was. The 2.5 inch variations seem to sound better than anything larger.

Asmig

Anyone ever try the Akrapovic? Hard to find any info on it since the cost was 6k+ without the headers.

frederik

I have a K16 car with stock exhaust and no drone. I have grown to enjoy the sound, it's certainly no screamer but the way the sound morphs from warm, deep and soothing down low to that Mezger snarl (more intake than exhaust) higher up the rev range, combined with turbo whistles, is quite satisfying. But it's no match for the way my Carrera howled through tunnels. There was a Supersprint exhaust on it when I bought the car and it droned quite badly.

kamlung

https://rennlist.com/forums/996-turb...pilations.html

i have the Kline 2.5 with hi flow cats now... they drone less than with test pipes... i think Europipe is your best bet...

docwyte

As said, if you've got a K24 car, you need the Europipe quiet. I've got that on my car, went from K16's to K24's and there's no drone.

It's a very OEM+ sound, like if Porsche had an option for a sport exhaust. It's nowhere near as rowdy as my old Soul exhaust. At the same time, the car was very tiring to drive any length of time on the freeway with that exhaust. Way too much volume and resonance.

2fcknfst

I found something similar with the Speedtech - it definitely made the most power, and howled like a banshee at full load, but had a weird resonance (to my ailing ears, a vibration) at 65/70mph, similar to the Soul.

Bernard IV

I think to fully fix that drone you need branch resonators tuned for that specific cruising speed/rpm frequency. I was thinking of doing something on my self built exhaust but it isn't terrible and I don't really commute in this car.

docwyte

I don't really think the Europipe makes less power than the Soul. It's just more quiet, so maybe it seems like it's making less power.

The car made ALL the power on the dyno with the Europipe. Even the tuner remarked that the lack of sound made him think it wasn't making the power it was, until he looked at the results.

Capt. Obvious

Your best bet for minimal drone is a 2.5" x-pipe setup, like the SpeedTech. It's pretty much impossible to have "no" drone on these cars though, especially with K24s.

Add in a quarter wave resonator and you're about as good as you can get.