everyone talks about sound but lets talk about power. with stock cats which exhaust puts out the most power?

 

Stillen SS TD still has the highest gains from any dyno I have seen. And it doesn't lose low end power like some others. Gain all the way, both HP and TQ. It does look kinda "plain" or "stock" and I hear it isn't very loud either. Might be good for those who wanna stay seemingly stock, like a sleeper car. It is one of the heaviest too, but atleast it is weight in the back or the car and when removing the stock exhaust and y-pipe, I don't think you gain any weight, just don't lose any.

 

interesting.
how about the borla td or fujitsubo dual?

 

From what I have understood Amuse Power House delivers the most.

 

I wanna hear more on this. Il be choosing my system with power as my main concern. Unless it truly sounds and looks like crap.

 

The APS has been dyno proven at 15hp.

 

amuse huh? isnt that over 2k? im not gonna drop 2k on just an exhaust. i dont have that kind of funds.
im sure the one that puts out the most power wont sound like crap. probably be louder.
still lookin for more input guys thanks

 

The above suggestions are great and all, but I don't think the difference in exhaust is going be be where you see any substantial power. Your only noticable gains on the exhaust end will really come from aftermarket headers and/or cats/test pipes.

Any of the listed aftermarket exhaust will do. The decision should mainly be based on sound and looks.

 

you are killin me with those last three mods

 

you should pick which exhaust you thinks sounds the best to your liking.....because they are all gonna make about the same power.

 

The exhaust gains are so negligible, just pick the one you like the looks/sound of.

I personally went with the Invidia g200.

If you plan on going FI later, make sure get one with large piping. No matter what I would go with a true dual.

 

injen! (straight tips...)

 

looks like im going btween the stillen ss catback & HKS Hi-Power True Dual Ti.
i like the HKS better but i think the tips are a bit too big. its also around 150$ more expensive.

 

they all make the same (well, within a couple hp of each other)

Once you sit down and compare the results of a true dual vs a traditional cat back + Y pipe setup, you'll see - there are TONS of threads on it.

I would not count on more than 10 rwhp, regardless of manufacturer claims to the contrary, from any setup

adam

 

Injen straight or angeled, dyno proven 15.9rwhp.
Stillen is only 12hp...
Borla claims 18rwhp.. but i havnt seen any dyno #s from them, and i had a friend who got the borla, dynod it, and got like 8hp from it...
Oh and my dyno #s from just the Exhaust, Intake, and test pipes are 257rwhp and 252rwtq.

 

injen is that high huh? maybe with test pipes and intake injen puts out 16rw but i dono about with stock everything else. sounds kinda high to me.

 

i think it also loses a lot of low-end hp/tq though. there's always a trade off.

 

It does give that much ... i am obviously not just gettn 16rwhp off the test pipes, intake, and exhaust when iam dynoing 257rwhp

 

Exactly! Pick your exhaust by the note that makes sweet music to your ears.... minimal HP difference between the major brands (especially after they are combined on your Z with other intake/exhaust mods) regardless of the amount of "salemanship" you read on their sites...

 

Actually no... they dont all make the same hp... some make 8rwhp, some make 16rwhp... i say more then double of another is a big difference, and if you combine some exhaust with the other manufactures intakes and so on, will give you even better #s. Like a injen exhaust and CAI is dynoproven to atleast 21rwhp.