New Exhaust Is Too Loud

[V35_Paul]

On the weekend i install my new exhaust and it sound great outside of the car but in the car it sound terribly loud.

Can this be fixed?

Will exhaust wrap help?

Do i need to sound proof my car some how?

[ka86]

On the weekend i install my new exhaust and it sound great outside of the car but in the car it sound terribly loud.

Can this be fixed?

Will exhaust wrap help?

Do i need to sound proof my car some how?

Avoid exhaust wrap. The ramifications of it is worse on headers but still wouldn't wrap it around the exhaust system (Google and you will see why).

You can spend money on sound proof but maybe just replace the muffler and resonator combo?

Muffler will help reuduce the noise and resonator will help lower/raise the ocative of the sound depending on the size/build quality etc.

[Dreadnought]

Hi Paul, the accoustic dampening in V's is notoriously poor. You might be able to splice some silencers in or get a tail silencer (never tried one, not sure how/if they work). I have also thought of sound proofing the rear, but havent spent any time working out how to do it best

A tune also helped mine, so it doesnt sit a 2k RPM and drone too much.

Let me know if you crack the solution

[Deep Dish V35]

over the decades ive played with many exhausts on many cars.... the one thing ive always found to improve things is the length of pipe after the rear muffler. having 6 inches of tail after the muffler makes it much quieter than having just 3 inches....

the other thing is having the tip too far back under the bumper, does a similar thing.

its not so easy to lengthen the output pipe these days with one piece stainless mufflers and tips...

and yes, stay away from wrap. agreed.

sound deadening such as dynamat can work but its much more expensive and heavier than just adding another glasspack muffler.

i would personally try packing cavities behind trim panels (bootlid, boot sides, parcel shelf) with quilt wadding as a cheap trial.

Edited April 17, 2012 by Deep Dish V35

[V35_Paul]

I like the idea of lengthing the tail pipes a bit.

This can can be done because i have bolt on tips

[81gSKy]

Hi Paul, the accoustic dampening in V's is notoriously poor. You might be able to splice some silencers in or get a tail silencer (never tried one, not sure how/if they work). I have also thought of sound proofing the rear, but havent spent any time working out how to do it best

A tune also helped mine, so it doesnt sit a 2k RPM and drone too much.

Let me know if you crack the solution

Yes, I would like to know as well. My only annoyance is the drone from 1500 to 2500 rpm.

[V35_Paul]

Quick fix.

Turn up my music.