Hi friends,

New to the forums, but not new to the G37 & 370z (have owned 3 of them now).

I recently re-purchased a 2012 G37xS, the exhaust had holes in it that needed to be fixed (had loss of power and high RPM, all the symptoms of exhaust w/ a hole in it), so I fixed it, no mechanical driving performance issues.

However the exhaust did not previously have a resonator, does have a muffler. So the current setup is resonator delete. The exhaust sounds AWFUL. Loud / obnoxious, raspy, tin-can, a 16yr olds cheap honda rice rocket. Here's my question.

1. Is this all due to the resonator delete? How it's loud and obnoxious and sounding horrible?
2. Or.... is resonator delete plus an after-market muffler that it has on?
3. Or.... could it be due to both things?

Would a simple resonator add/install fix the issue hopefully? I have a baby on the way, and this things sounds OBNOXIOUS, inside the garage morning start up when the car is cold, omg it's SOOOOO LOUD (not in a sexy sounding exhaust sort of way, more like wtf is wrong w/ your car sort of way) and I have to tell my wife sorry I'll get this fixed before the baby lol

Thanks for the help!

 

I don't have any specific advice, but I will offer these opinions.

1. Cold starts with the VQ sound terrible (IMO), like a diesel.
2. Exhausts always sound better with resonators in the mix.
3. Babies absolutely love loud exhausts.

Drop the kid in the back, drive around the block, and he or she will be asleep is less than a minute.

 

3. Sadly this isn't a sexy exhaust note to enjoy, it's a cheap tin-can raspy one that has everyone like "what's wrong with it" sound lol

As a former camaro & corvette & 370z owner, I enjoy a good loud exhaust, just not when they sound just loud but not good. Have never experienced this before, so was trying to see if the resonator is the issue to all my problems.

 

Did you mean "mufflers", plural? These cars came with 2, but many like single exit aftermarket exhaust setups.

If you have two stock mufflers, buy a set of Vibrant 1790 12" resonators and add them to the midpipe.

12" is shorter than the stock 17" resonator, so the tone will be a little deeper.

OR, buy a used midpipe and DIY the install at they are plentiful on FB marketplace.

If you need a set of stock mufflers with very few miles on them, ping me as I have a set collecting dust in the garage,

 

He probably has a Coupe, but didn't say otherwise.

 

I have a sedan, so two mufflers.

I'm thinking that having zero resonator is the problem. The thing doesn't sound good and it's loud and not good.

So your suggestions to adding one might be the answer. The tone and the volume are the problem, not just the volume. But bc it's so damn obnoxiously loud/rattly, you can't even tell if it could sound good or not.

 

I'm not sure I have seen anyone remove the resonators only? Many do muffler deletes, and I'm not a fan, but removing only the resonators sounds like someone was experimenting.

Sedan mid-pipes are plentiful and straight forward to replace if you just want to go back to stock.