I have a nismo exhaust system on my 2007 350Z, and for the first 6,000 miles i sounded really deep and toned nicely, but al of a sudden it just sound like the car doesnt even have a exhaust system anymore does anyone know what it might be? thanks

 

maybe you got used to it? no clue

 

you definitely just got used to it because the nismo exhaust lasts 7,000-10,000 before it stops working

 

u got use to it and nismo is jus not loud

 

Its your imagination.

 

you've got to be kidding me...you probably just got used to the sound. Throw in some testpipes, that'll wake you up haha

 

you definitely got used to it. i had a loud flowmaster on my old camaro and passengers would always wonder how i dealt with the sound. it was completely normal to me.

 

hmm thats weird it seems that cant be just overnight? but i guess so, I think i might have a crack in my exhuast too ill have the dealership check it out thanks!

 

Well, one possibility is that one of your cats has come apart and is blocking the pipe, but that also usually shows reduced power.

 

That made me lol!

 

Maybe time for a sweet true dual aftermarket exhaust system

 

Goes to show, it pays to research before you buy.

 

I have another possible cause. It has been noted here many times that the Nismo is quiet until you get on it and then it opens up.

Maybe your not driving it right?

 

Yea Nismo is waaaaayyy to quiet. Turn ur radio off and you might hear it again.

 

add some HFC's, you'll hear it again

 

Carbon Buildup muffeling the sound a bit?

 

+1 Adding HFC's even livened up my stock exhaust. Sounds a lot more aggressive in the 2-3k range and a little bit meaner in the 4k+ range. It'll also give you a bit more high-end power.

 

LOL I believe the OP means it sounds like it has no exhaust meaning it is loud.

If that's the case you probably blew out your mid pipe gasket.

I had mine replaced 5 times in a year and a half. Long story but I bet it's one of your gaskets. Might have cracked though.

When mine went out it sounded like a monster truck.

 

i just installed my nismo exhaust yesterday, and i already had the nismo headers. it definately wasnt as loud as i thought it would be but i still love it! you should find a stock exhaust and listen to it again.

 

^^^very true. i had my nismo + berk hfc for a while now

my cousin drove me somewhere in his stock Z and its much quieter. But i do miss the sound in the low RPMs that the stock had and the nismo doesnt