I just switched out my Evo2 for the Buddy Club Pro Spec today and it is way louder than i expected it to be...so im already set on selling it. Im wondering how the Vibrant compares to the Pro Spec? I can't even hear myself think in the car when driving with the Pro Spec and I definitely don't want to get the Vibrant if it sounds just as loud. Has anyone had the Vibrant and the Evo2 or Pro spec and can compare the sound level for me?

 

i have Evo 2 on my 07 Si and like it as is, plannign on turboing within the next year, and prolly will be changing to a 3" exhaust and more or less the Vibrant but if these links help this is what ive found

Hope these help

http://www.8thgencivic.com/forums/bo...und-clips.html

or this might be more benificial

http://www.youtube.com/watch?v=1MJa9GAF52g <---- Launches
http://www.youtube.com/watch?v=7rAyMGQNYk0 <-------- Fly bys

YouTube - ************* Conquers the Dragon III Exhaust Video - Part One: The Launches
YouTube - ************* Conquers the Dragon III Exhaust Video - Part Two: The Fly-Bys

 

I've personally installed the vibrant exhaust on 2 si's one two door and one four door (street spec). They sound just like the stock exhaust except a little deeper and a little bit louder. The fitment is perfect the welds were flawless. And i personally run a custom vibrant 3 inch on my k'd hatch. I wouldnt run anything else. Plus they have awesome customer service.

 

vibrant is louder then the evo 2 but quieter then the BC pro spec. The BC pro spec is one of teh loudest exhaust they make for our cars.

 

Well i ordered the Vibrant to replace it. The girlfriend said the BC definitely had to go bc it was way too loud for her, so i've put it in the for sale thread. Let me know if interested guys.

 

How much?

 

I'm asking for 470 Shipped, all the info is in the for sale thread

 

Anyone know the Hp difference between a 2.5" to a 3" exhaust is?
Just guessing im figuring maybe 1-2hp if no maybe 3hp, but if im wrong please correct me just curious.

 

Well it depends on what your setup is.

The larger the exhaust, the lower the back pressure. However, too large of an exhaust and you end up losing power.

 

well my plan within the next year is to ger the AJP turbo, wil my 2.5" be good enough or is it worth buying a 3" exhaust. I mean is the difference in HP that noticeable? between .5"..

 

If you're going to boost, I'd go with the larger diameter piping.

 

X2

 

Well to answer my own question I found this

An often asked question........

3" or 2.5" Exhaust System? or maybe 3.5"?

Basically, as a rule of thumb, if your intended use is strictly street, for cruising and maybe as an everyday driver, then 2.5" will be adequate,,,,,,,,,, unless you have 500 HP or more! For the strip, if you have a power plant rated around 425 or more realistic horsepower, then the 3" system would be the way to go. Powerplants with few horses just will not benefit from the larger 3" exhaust although 3" tailpipes showing from behind the rear wheel or under the bumper will make quite an impression. It's been our experience that too big a system will not hurt performance (as long as the primary tubes on the headers are not too large -- Headers do the main 'tuning' of the exhaust), just cost a little more. Now, how about 3.5"? This Huge size is reserved for the really serious,,,,,,, say 600 horses or more!

If you're not sure of the horsepower rating of your powerplant, but have raced at the dragstrip, then any 1/4 mile ET's in the 12.40 - 12.70 range or quicker would benefit from the larger 3" exhaust versus a good 2.5" mandrel bent system.

With powerplants in this horsepower range or up to 575, with a 3" system, you will be able to basically turn ET's equivalent to those with open headers. Imagine! Running through the exhaust and turning low 11's while your competitor is struggling with all the noise and just trying to keep up.

Most 525 HP or so powerplants will never know the difference between 2.5" or 3" on the street for daily driving or cruising, although the big 3" "sewer Pipe" will certainly look great!

Now, IF you're in the 575 HP area, the Big 3.5" pipes might be your ticket. These are some really HUGE pipes and we've had reports of guys loosing their arms in them....just kidding!

The Following Tech Tips are courtesy of the Dynomax Division of Walker/Tenneco web site. This info can be found here at www.dynomax.com/techsupport.stm.

http://www.torquetechexh.com/whichsize.htm