What would be the quietest exhaust choice assuming this was what you were shooting for?

I am going to be running a full 4" custom exhaust on my ST which will go to my 3" Turbo XS exhaust. At the track I will remove the exhaust from the steering rack back and add a simple 4" turnown.

EvoTT .. even though i find it annoying while crusing at low RPMS..

the most ideal exhaust for sound would be the Nismo Exhaust though.. probably not good for 600whp though

Why not use the SP exhaust cutout? Boost controlled and will be perfect to keep that "stock" sound.

Also OT but Quamen, what's the move toward to turbo? i was looking forward to your twin supercharger idea.

The AAM exhaust is similar to the APS exhaust and the AAM has removable baffles that I was wondering if they could be swapped into the APS :dunno:

What I have with recirculating wastegates would be very quiet, but you'd give up some power. But like mentioned just do the SP cutouts for when you want the big power.

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I was able to sell my old setup for more than what it would cost me to switch over to a turbo that would be just as capable as the twin charger setup with half the hassle.

you made over 600? If so when i missed something ?

EvoTT

EvoTT see sig.

not 600whp yet but yeah, it'll still be the EvoTT without the 2.75" inch bottle neck when she get there.

Ok it doesnt matter if you made 600 or 400, with a 3" TD turboback, it still performance the same way.

what does the thread title say? so what do you mean it doesnt matter?

Evo TT w/Bottleneck removed. Also w/ SVRT Wastegate Relocators and SGP open dumps.

Greddy Ti-c TT with 3" downpipes and open dumps on the wastegates. Not 600whp yet, but heading that direction pretty quickly.

Yeah todya I took off the HKS and just left it open haha.
It's annoying :( I looked at the Greddy TI-C since it has the same inlet with Evo TT.
But I guess I will just go with something 3" even 3.5" with custom so I don't have to upgrade ever lol.
Guys with the custom exhaust setup which brand / what size muffler did you go with?

u dont even have 1 turbo:dunno:

quiet exhaust still with power go Greddy TiC. If u dont care about how loud it is i DEF say go 4":thumbup:. And HKS and Turbo is a :icon22:;)

whatz up with this bottleneck everyone is talking about with greddy exhaust?

it tapers down to like 2.5" at the flange that meets the test pipes. people just cut that out and weld on a piece of 3" pipe and taper it to match the rest of the 2.75" exhaust

What about the APS TD (2.5") ?