Hello) 2 days ago I nstalled my new sikky headers with Joe Z exhaust/intake. And now I have a problem with very loud exhaust. What you recommend me to do, buy maybe some cats or to make Soundproofing of the trunk ( Noise isolation , sorry for my english) ? Ears start to hurt after a ride with my exhaust

 

You could either switch back to your oem cat-back or you can have new cats installed on your joe-z exhaust system.

 

which cats? give a link on it please

 

your gonna be in the same situation this coming weekend also.. lol.


is it really that loud..?

 

im guessing any high flow cat. or you can custom fit the stock exhaust to make it work with your set up.. i seen somebody did that on this forum. search.

 

I have very big drone on 1.5-2.5 r.min((( I can loose some hp when i install some high flow cat. But someone in this forum installed some cats without loosing hp. But i cant find him. I saw his thread

 

If you install cats you'll lose some horsepower for sure, but it won't be a massive amount. It'll help you with your drone, but you may want to try fitting the stock exhaust first. Adding cats (from what I've read) may cut down on drone and overall sound level but not enough for your taste.

 

It will also keep the rear bumper alot cleaner

 

maybe try to install some resonator
or it will not be effective?
Need advice from who did it

 

That's another plus

 

or Flame arrester?

 

here you go bro..

https://www.clublexus.com/forums/is-...z-exhuast.html

 

Please can you say briefly what you need to do to become quieter and not lose hp

 

and i saw another thread with dyno diargam

 

I remember Caymandive was using race hi flow cats. Forgot the name brand but also be warned that a member on here who tracks his car had the cats melted from overheat due to tracking his car. If your just daily driving it should be fine.