H3 First Cat

[06 H3]

At idle no but under load ovet 3k rpm its louder

 

[Best4x4]

Guessing it doesn't have a heatshield? Did you have to evac the A/C to install it? Pics?

 

[06 H3]

Nope no heat shield I could probably adapt mine if I wanted to. I might do that or wrap the headers. No modifying anything other then the header portion that was touching.

Has anyone sound deadened their h3? It's a bit louder and with 37s I think it's reaching that time to make it quieter

 

[3Hummers]

I sound deadened our H3 once...but then she got back in.

 

[4speedfunk]

Earbuds & Pandora!

 

[06 H3]

earbuds!! Its not that bad. I will do a db test on my iphone to see how loud it is.

 

[06 H3]

They say 70db is average inside the average car. Wonder what a stock H3 is. Maybe 80? My guess is im at 90ish...I think my brothers jeep is probably nearing 100 with the doors and hardtop on

 

[Best4x4]

Vs all my Jeep's my H3's are very quiet inside!! I have the occasional interior creak over bumps, DB wise it's much lower.

 

[06 H3]

My db levels maxed out at 89 last night on the freeway at 70ish. I would say it's normally 85 peaking around 88-89

 

[CaseyS]

What did you measure that with? I'm curious how my engine changed things.

 

[Scarsman]

This got me curious, so today I downloaded an app called Sound Meter. Driving on county two lane with speeds up to 55 and acceleration running the motor up to 5000 rpm, it maxed out at 83 dB. That is with worn MT tires and Flowmaster exhaust. Here's is a screen shot of the app.

 

[06 H3]

an app on my iphone decibel 10th.

Did u get my PM casey