Vibrant Performance Exhaust

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Originally Posted by anandoc

Nope, both my resonators are intact. I thought I would wait to see what the exhaust swap sounds like...and maybe I can remove the resonator later if required. Sounds like I am going to keep my resonators. Oh and I have the 2.5" version (Vibrant 1148).

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Hmmm, I don't know much about fluid dynamics, but could the smaller inlet maybe cause the droning, verses the 3" inlet?

What I did on the BRZ was add additional sound mating. Its an extra step, yes, but it also cut down road noise dramatically. I used this product:
http://www.protectowrap.com/flashing.../bt20xl-butyl/

It works great because its only 4" wide and is very flexible. This company makes an audio sound mat, which is made form the same material in hte product I posted. Only difference is that it is twice as thick and cost 2 to 4 times more depending where you go to buy it. I wish I had the photos of my BRZ to show you.

Some strips on the trunk floor and along the trans / drive shaft tunnel would make a big difference

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Originally Posted by GotZHP

Hmmm, I don't know much about fluid dynamics, but could the smaller inlet maybe cause the droning, verses the 3" inlet?

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Not sure...the other guys here used the 2.5" version and didn't seem to have any droning. I will give it a few more days for it to fully break-in and for my ears to get used to the extra sound :)

The interesting thing is that if I drive with my windows down, it is not much of a bother since I hear plenty of other road noises and it all blends in. Its when I drive with all windows up that the 'droning' is more apparent.

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Originally Posted by GotZHP

What I did on the BRZ was add additional sound mating. Its an extra step, yes, but it also cut down road noise dramatically. I used this product:
http://www.protectowrap.com/flashing.../bt20xl-butyl/

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Yeah sound-deadening is on my to-do list as well. When I did the fuel-pump replacement, I noticed that all the sound-deadening under the rear seat had crumbled to bits. Maybe I will do this next spring using the following DIY

http://www.zhpmafia.com/forums/showt...eadening-Guide

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Originally Posted by anandoc

Not sure...the other guys here used the 2.5" version and didn't seem to have any droning. I will give it a few more days for it to fully break-in and for my ears to get used to the extra sound :)

The interesting thing is that if I drive with my windows down, it is not much of a bother since I hear plenty of other road noises and it all blends in. Its when I drive with all windows up that the 'droning' is more apparent.



Yeah sound-deadening is on my to-do list as well. When I did the fuel-pump replacement, I noticed that all the sound-deadening under the rear seat had crumbled to bits. Maybe I will do this next spring using the following DIY

http://www.zhpmafia.com/forums/showt...eadening-Guide

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Pretty sure that stuff is what makes the car smell like crayons.

http://www.ft86club.com/forums/showt...t=71153&page=2

there is the post about my BRZ. I bet you can guess which is my user name lol.

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Originally Posted by GotZHP

Pretty sure that stuff is what makes the car smell like crayons.

http://www.ft86club.com/forums/showt...t=71153&page=2

there is the post about my BRZ. I bet you can guess which is my user name lol.

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Nice! I am sure some proper (and much needed) sound deadening would help me out as well.

I find it weird that anyone is experiencing any droning from the Vibrant muffler. Like I said, I have the muffler and the second resonator out and I don't really hear too much droning. Maybe a slight amount, but nothing that would ever bother me.

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Originally Posted by anandoc

Nice! I am sure some proper (and much needed) sound deadening would help me out as well.

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So worth it. The BRZ came with none so road noise was terrible. You could hear every single little pebble hit the under body that was kicked up by the tires. I did 3 layers in the wheel wells, trunk floor, and rear seats. Two layers under peoples feet. Single layer in the doors. No layers along the trans tunnel and fire wall. This allowed some exhaust note and engine sound in the cabin.

Roll the windows down, and bam, loud exhaust is back

So this happened... install will be coming within the next few weeks.

Attachment 27221

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Originally Posted by FL116

So this happened... install will be coming within the next few weeks.

Attachment 27221

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Good grab! I was going to get them but the funds came in too late.

Getting a few quotes today to get the muffler installed.

Question, is it better to have the Y-pipe upstream of the muffler, or run individual pipes and Y right at the muffler?

I am removing the second resonator

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Originally Posted by FL116

So this happened... install will be coming within the next few weeks.

Attachment 27221

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They'll be much easier to install that the Gen 3 headers