Any body know which one is the conservative?

I have it and it's really quiet, even w/ a straight pipe!

Many of us that wanted a sleeper went with T1R Sparrow, and loved it.
Buschur Crossflow, Cobb, Magnaflow, and Greddy spectrum are pretty quiet as well.

Buschur Exhaust w/ quiet muffler is NOT that quiet, it's the first exhaust I had, and I couldn't stand how loud it was, it was alright with stock cat, but with a straight pipe.... lol.

I was looking for a quiet exhaust, and I went with the Greddy SP Elite (same as the Greddy SE which has been discontinued except for polished instead of Ti burnt tips), and it' very quiet. It's slightly deeper and gruntier than stock and absolutely no drone. It's one of the option if you want a quiet exhaust.

HKS LEgamax or any Jasma certified exhaust
ETS quiet

I use Magnaflow, is very good at low speed is quiet and high rpm (4k 5k ...) is noisy but well-defined sound

Magnaflow

Stock? 99% sure there isn't a quieter aftermarket catback than stock.

Cobb Quad Tip is pretty damn quiet on my car with ams dp/ets tp.

buschur x flow gets my vote. its larger the fujitsubo too. when i got a test pipe cabin noise lessened as well

Love my ETS quiet but its not exactly quiet like some of the others.

Tanabe touring

lol I agree the one in the video sounded descent though I wonder if that one had a TP?

Stock + testpipe is a little louder, very very little at idle and probably 10dB at full throttle. That's what I run.

well here we go
stock DP , with stock Cat :


and then with racepipe , stock DP


Its quiet .. but not as quiet as most like you pointed it out