Does this exists?
 

I'm looking for a quiet catback, or better an axle back, in 60mm with just resonators and no mufflers.
Do you know if this exists?

anything without a muffler is going to make more noise than stock. you might be better off changing your exhaust tips if you want the look without the noise.

This? Namelss Single exit without muffler. FYI it's louder than stock. Even muffler ver was louder.
https://www.carmodsaustralia.com.au/...ll/RSPD016.jpg

I would suggest you consider this axle back with 5" mufflers (just call the mufflers resonators ;)).

https://shop.namelessperformance.com...r-s-2013-2016/


humfrz

I am with humfrz, mufflers muffle sound. Resonators resonate sound. Not sure you can get quiet without the muffle.

Supersprint just use resonators, and they are very quiet. But the one for 86 is 63 mm.

From the outside, they look like little mufflers to me .. :iono:


humfrz

Can I ask why 60mm is required and 63mm is unsuitable?!

Nope, Supersprint just uses resonators in its exhausts, even the version with 1 resonator, it has Y drilled pipe inside. 63 mm moves torque toward high revs.

So to answer your question, No. An axleback or catback doesnt exist that's going to be "quiet" when you exclude the sections that make it quiet. And 3mm increase diameter in piping isnt going to make a dramatic leap and move all the TQs way high in the rev range, let's be real.

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You will be lucky to have any horsepower or torque difference with a catback so 3mm either way isn't going to shift your torque curve.

You said the supersprint has the resonators and the volume you want and basically the size you want. I'd just go with that. Don't get hung up on paper specs.

I agree somewhat with your concern for pipe diameter.
I would go with keeping the piping the same as what is coming off your header/overpipe.


For example I had Gruppe-S UEL with overpipe that ended in 60mm.
Therefore I went with An Invidia FP an HKS catback 60mm. This keeps VELOCITY consistent all the way through.


Now I have just installed ACE 350 Headers/overpipe that end in 63mm(2.5").
So I just now ordered a Hooker HF cat/Helmholtz J-pipe Front pipe, And Agency catback exhaust all 63mm (2.5")


Will there be a huge change in HP/TQ I doubt it. But I like knowing the flow will be consistent all the way through without either bottlenecks (too small piping) or too slow velocity (too large piping).

I'm also with @humfrz I can't find a version of their exhaust WITHOUT mufflers... https://www.supersprint.com/ww-en/to...-hp-12-16.aspx

Maybe the terminology or translation is different? Are you thinking of the Catalytic Converter?

@gpvecchi what do you consider a "resonator", what do you consider a "muffler"?


humfrz