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Discussion Starter #1
Axel back or Catback or Full Race Exhaust.

What's cooking for the BRZ?

I know HKS is coming out with a Hi-Power Spec L and Legamax Premium.

Greddy is coming out with an apparent Evo 2 catback and a Spectrum Elite SE that was on the black Greddy FR-S

Don't know if this video is real

What else is being made? Throw up whatever you find.
 

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The Hi-Power Spec L looks/sounds pretty good from the video. The only thing I wonder about is noise level at cruising speeds. It appears the Legamax is just an axle-back so that's not for me.
 

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The Hi-Power Spec L looks/sounds pretty good from the video. The only thing I wonder about is noise level at cruising speeds. It appears the Legamax is just an axle-back so that's not for me.
I'm curious why you say this. Up until that point all it is is header/cat/and resonator. A resonator is necessary to quench drone. That leaves the purpose of any aftermarket muffler, in my opinion, one of a volume control, nothing more.

Despite what people have speculated, aftermarket headers won't do much better than what's OEM, Subaru did their homework. They'll still need a cat for emissions, so there's not much to be gained there, if any. That leaves just the mid-pipe with the resonator... and nothing is going to improve on it.

Personally, I don't want another car you can hear coming blocks away, like mine is now. Don't get me wrong, I love this STi's SPT exhaust. It fits the car. But the BRZ is a more refined machine, and should have a bark to match its bite... which isn't very vicious. Borla made an exhaust for older Subys that had a sound I'd want in the BRZ... deep, round, dignified. I'll know it when I hear it, but these are not it.
 
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I was wrong. The Legamax is a catback exhaust, they just didn't show it in the video. Both exhausts replace the stock midpipe with the resonator. The difference between the two are pretty substantial though. One is similar to the stock exhaust (but I assume it uses larger piping), and the other uses a Y-pipe and uses 2 separate mufflers. The Spec L to me looks like it has potential to make some power, but we don't know what works on this engine yet unfortunately.

The stock header does look pretty efficient, but in time someone will find something better. Subaru used a 4-2-1 design, but until someone tests other designs, we'll never know. Since this engine is new, it's hard to pin down just what size piping works best and whether a non-stock piping design will be better or worse. From looking at the dyno graphs from this car, some extra torque in the low and midrange wouldn't hurt. Only a dyno will tell the tale.

Lastly, I definitely don't want a droning exhaust on the car either. I want a nice aggressive, deep tone...but not something that is maddening on my daily commute.
 

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GReddy exhaust has to be my favorite sounding BRZ aftermarket exhaust so far, love the aggressive tone it add's, really opens up that FA20. I wonder what performance gains are like from stock to GReddy and GReddy to HKS.

We need some dyno numbers!
 

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i wonder when Invidia will hop on this and start making exhaust for the car, those are nice looking pipes!
 

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Discussion Starter #9
I'm curious why you say this. Up until that point all it is is header/cat/and resonator. A resonator is necessary to quench drone. That leaves the purpose of any aftermarket muffler, in my opinion, one of a volume control, nothing more.

Despite what people have speculated, aftermarket headers won't do much better than what's OEM, Subaru did their homework. They'll still need a cat for emissions, so there's not much to be gained there, if any. That leaves just the mid-pipe with the resonator... and nothing is going to improve on it.

Personally, I don't want another car you can hear coming blocks away, like mine is now. Don't get me wrong, I love this STi's SPT exhaust. It fits the car. But the BRZ is a more refined machine, and should have a bark to match its bite... which isn't very vicious. Borla made an exhaust for older Subys that had a sound I'd want in the BRZ... deep, round, dignified. I'll know it when I hear it, but these are not it.
I get where you are coming from but I don't see why you would get an axelback if you are going to allow the midpipe to bottle neck your exhaust system. Race headers do give a bit of extra power though not much (10whp?) and with a catback you might gain 15whp at the very top? It'll be illegal though, and loud. I've seen some straight through exhausts that arent THAT loud. I think it depends on the design of the muffler.
 

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Apexi exhaust seems to have more a clean sound, something closer to stock, then there's the HKS exhaust that sounds how you expect a hardcore aftermarket exhaust to sound.

Still not pleased with all the exhausts i've been hearing.
 

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I'm with some of the above posts. If this is what the aftermarket sounds like then I'll be keeping the stock exhaust. Mind you, I've been spoiled by V6's over the last decade.
 

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Discussion Starter #17
Welcome to the 4 cylinder world. Engine doesn't make a significant sound so we use aftermarket exhausts to free up some flow and create a different sound. I'm not too fond of the stock BRZ exhausts. I'm still looking for a good aftermarket exhaust.
 

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I want one that sounds like the engine noise inside this Lotus' cabin (not the sound of it's exhaust) when the driver is flooring it. Something that sounds supersonic rather than ricey or throaty.

 
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