Blame it on our higher cr too


Sent from my IBrick

There is no better sound muffler and resonator than the turbo.

Seen your header vids..but was wondering..
I know you guys mentioned the full header back setup was much louder with the hks catless compared to your own catted header (= 1 cat total, on the fp)..but, what if, it was a header back setup with a catted header like yours and a catless fp this time (= 1 cat still, but on the header now instead of on the fp)?

In other words: Would a catted header back system with a catless fp sound similar to a catless header back setup with a catted fp?

I am guessing it would sound the same....unless there is a difference in noise/flow between the cats used in headers and fp's.

I'm running a catless header, invidia catted front pipe, and the Q300 and in my opinion... it's TOO QUIET. Q300 is as quiet as they come, which is not a bad thing. Invidia has very straight pipes all the way back to the muffler which is why I love the design. It's definitely louder on cold start and when I get on it, but any highway cruising, regular driving is very quiet inside the cabin.

It has nothing to do with c/r, it's because a turbo will quiet an exhaust WAY down.

We actually ran the catless HKS EL header, catted front pipe, and then our V1, V2, Invidia N1 and all three Tomei Systems on the red car. All three where too loud for me for a daily driver when combined with a catless header.

A catted header does way more for reducing sound than a catted front pipe does. The only catless set ups I have heard that are reasonable for a daily driver are the below combos.

A Catless Header + Catted Front Pipe + Perrin 2.5 Resonated
A Catless Header + Catted Front Pipe + Invidia Q300

I ran a 3" straight pipe on my last STI with just a helmhotz resonator and it was completely comfortable to listen to. Turbos do wonders.

Stop making me want a turbo @mrk1

I know it's not an apples to apples comparison since I don't have a full catback, just an axleback, but my catless borla UEL header (for now) + catted and resonated nameless frontpipe/overpipe combo, stock midpipe and nameless axleback is quiet on the highway and quiet enough on the street.

Magnaflow (MY CAR)

[ame="http://www.youtube.com/watch?v=56LafpqHz5I"]Magnaflow Catback Exhaust- GT86/BRZ/FR-S - YouTube[/ame]

The problem with all these topics is that sound is something that is completely subjective. I was told that the perrin 3" resonated cat back with catless headers was quiet, but when I got them on and cranked it up the car sounded way to loud to me. Just get a catless header and leave the rest of the exhaust stock. You'll get all of the horsepower gains with a tune and none of the boy racer sound.