name that catback
 

Can anyone identify this catback? Besides some drone it seems pretty good, but I am running close to the sound limits at some events. Wonder if these mufflers degrade, I haven't changed anything. Are these mufflers heavy?

(haven't had it off - yet)



Thanks,
- Jeff

Re: name that catback
 

Borla. Quite restrivtive. I got rid of mine long ago.

Re: name that catback
 

:iamwithst The square tips are the giveaway, definitely Borla.

Re: name that catback
 

It's Borla, I have it on my Z. You may lose 5-10hp on this exhaust setup, but it has zero or minimal resonance.

With a set of Headers, No Cats, modified resonator the system works great. It's quiet but comes to life when you get on it.

If you are looking for something loud, go with another exhaust like B&B.

Re: name that catback
 

so what is modified on your resonator?

Re: name that catback
 

100% agree its a Borla. Suggest Corsa

Re: name that catback
 

Prob LT4 resonator would be my guess

Re: name that catback
 

Borla necks down as it enters the resonator. You need to make resonator so it doesn't neck down.

You modify existing resonator or you buy LT-4 resonator.

Re: name that catback
 

I see.. I have the Borla Challenge system.. I have a LT4 resonator and I also have a Magnaflow resonator.. debating on which to try first

Re: name that catback
 

They can degrade. Borla uses a packing material as the means of sound attenuation. I don't know the specifics, if it's all glass packing, or glass and steel.

The packing can get compressed to where it does not work as well, or get shifted around or blown out of the casing over time. So yes, they can degrade. If you've had them a long time and they seem louder now than they did, it's possible that's what happened.

Heavy, I don't know. I don't think the weight range is enough to choose a muffler based on it vs sound quality.