which exhaust
JK Junkie
Joined: Aug 2008
Posts: 2,207
Likes: 0
From: Vancouver B.C.
....totally louder than stock....I get alot of comments that it sounds great....nothing negative. click link below...disregard my brother cheering me on....
I think I took about 4000 miles off the tread of my Pro Comps going up that hill...
http://s42.photobucket.com/albums/e3...0080906191.flv
JK Newbie
Joined: May 2008
Posts: 21
Likes: 0
From: Orlando, Florida
I have the gibson dual and I don't have any problems with it. I love the sound, especially with the doors and top off. When you first install it though be prepared for it being pretty loud. After you break it in though it settles down into a nice deep tone. Just watch yourself with the gas. I find myself revving the engine just to hear it all the time 
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JK Super Freak
Joined: Apr 2007
Posts: 1,699
Likes: 3
From: Lancaster Pa
What is your objective? Are you looking for high RPM power or low end torque, or just for looks and sound.
As with any vehicle, the JK's stock exhaust has been tuned to the engine for maximum power and efficiency throughout the entire power band. Although changing the exhaust will have some effect on the engine, contrary to the company's boasting that this exhaust will add 20% more HP is just BS. It does not work like that.
It is true that by increasing the diameter of the piping and installing a more free flowing muffler will give a bit more power at higher RPM's it will also decrease the low end torque. That is the laws of thermal dynamics. And that is just what will happen if the engine is not modified to produce more power.
All these bolt on do-dads like the high performance intakes with high flow filters and the TB spacers, as well as high performance exhaust systems, will add littler or no power to an engine that has not been modified for these components. They will in fact change the power band characteristics a bit, but nothing more. If you are looking for a bit more power in the high RPM range, a free flowing muffler will fit the bill. There are a few reputable company's that make these. Gibson, Banks, Burns, MagnaFlow, Flowmaster and the likes. Each will produce pretty much the same tone, although some might be a bit louder than others.
As with any vehicle, the JK's stock exhaust has been tuned to the engine for maximum power and efficiency throughout the entire power band. Although changing the exhaust will have some effect on the engine, contrary to the company's boasting that this exhaust will add 20% more HP is just BS. It does not work like that.
It is true that by increasing the diameter of the piping and installing a more free flowing muffler will give a bit more power at higher RPM's it will also decrease the low end torque. That is the laws of thermal dynamics. And that is just what will happen if the engine is not modified to produce more power.
All these bolt on do-dads like the high performance intakes with high flow filters and the TB spacers, as well as high performance exhaust systems, will add littler or no power to an engine that has not been modified for these components. They will in fact change the power band characteristics a bit, but nothing more. If you are looking for a bit more power in the high RPM range, a free flowing muffler will fit the bill. There are a few reputable company's that make these. Gibson, Banks, Burns, MagnaFlow, Flowmaster and the likes. Each will produce pretty much the same tone, although some might be a bit louder than others.