Reggied

2005 Corvette.
I am pretty sure I have after-market pipes on my vette. Why are the pipes much louder in the car than if I stand behind the car and listen to the pipes. Any ideas on how I can lower the loudest in the car 10 to 15dBs.

I was shock to see the thin metal chasis right behind the seats. I would think it should have some sound damping foam there instead of just carpet.

The road noise I can handle...the pipes WOW!

saplumr

You can go through the trouble of sound blocker but if we knew what system you had it would help. Loud to one is docile to another.

b murph

You can pick up a stock C6 exhaust on Craigslist or E-Bay for damn near nothing. I had problems giving mine away.

Reggied

I can try to get under the car and look for a part number or brand name.

Rich Mickol

My guess is you have an aftermarket exhuast. I had a 2005 and that car (exhaust) was quiet.

You could try TKO's Blockit. I have a 2012 GS with NPP and a Mild to Wild switch. With the butterflies open, it loud. The Blockit takes the edge off.

saplumr

If you don't find it just take a pic of the tips and muffs.

Gman in NC

I hauled mine to the recycle center.

KBow_Photo

if you get the dual mode, the car sounds like a proper V8 sports car with it open, closed, not so much, not much sound, boring, uninspired

b murph

Pawned mine off to a guy up the street who is building some sort of GM 4x4, just to get it out of my life.

B-Vette

Yes, change them out and sell your existing pipes on ebay as some others have suggested.

Corsa makes some nice moderate touring pipes that sound great!

WAwatchnut

It's louder inside the car because the rear glass acts like a horn to focus the sound straight at the drivers head. Combine the sound of the exhaust with the vibration of the rear tub (which is a thin "plastic") and panel behind the seats, and you have DRONE.

If you like the sound of the exhaust, tame the drone by properly insulating the hatch area.

Add vibration dampening in a 50% coverage (DynaMat xTreme or similar products) directly to the plastic rear tub, and behind the seats. Then cover everything (100% coverage) with a sound deadening material like Ensolite.

About $100 in materials, and 3-4 hours of time, and there will be a big difference.

Here are a couple of threads:

http://forums.corvetteforum.com/c6-c...deadening.html

MikeERWNC

Happiest day of my life was removing the SLP and installing the OEM on my car.

My wife loves riding with me now, and she is partially deaf.

speedraider

I used the DynaMat and it worked great

Reggied

I hope these are good enough..if not I will try to take better ones

Gman in NC

Not sure what they are but they're not stock for sure.

saplumr

And I thought that would be the easy way to find out. Not Corsa, Borla, B&B and don't seem to be SLP, Magnaflow, Akrapovic or Flowmaster.

eboggs_jkvl

Get a NPP exhaust. I have it on my car. I have the control switch coded in to my sun visor buttons. Open is loud, closed is stock. The wife loves it. We can cruise at 75 on the highway and no drone or noise. When I'm by myself, I can get good and vulgar. I running long tubes and cat-less. I can talk on the Bluetooth phone while cruising down the highway.


Elmer

Reggied

Keep in mind I am a newbee to the C6. What is a NPP exhaust, How much to purchase/install. Sound damping interior or NPP exhaust...I will need more time to make best choice.

saplumr

NPP is a bi-mode exhaust which means it has dampers in 2 of 4 tips which open and close via remote switch. Closed quiet, open louder. The NPP is not for everyone due to the fact they're not loud enough and there is some clutter at the tip area but the ones that have them like them. Others take them off and switch to aftermarket.

eboggs_jkvl

Well, loud was his problem. He wanted to tone it down a notch. The NPP is the quieter side of the bi-mode exhaust options. With my Long tubes, no cats and supercharger, loud is an easy commodity to generate. Quiet, on the other hand, is a challenge. The NPP closed is like a stock exhaust and totally fantastic for highway cruising without loud noises. Open, with my setup, and it's pretty damn loud.

Elmer