Wow....some misconceptions going on in here-
First of all, the Magnapacks do drone more then the Magnaflows....
The Magnaflows have less drone then the Borlas do...
Saleen changed from
Borla to
Magnaflow, not only because we made more power, but because there was less drone as well, which was very important to them...
The Packs are very very very aggressive......
We made them that way.
By following the standard federal testing procedure, a stock GT with the Magnapacks was making 100dbs at only 3000RPM
We designed them to make some noise.
Our catbacks are constantly evolving as we discover new technology and new ways to reduce drone.....
A common misconception is that factory exhaust systems do not drone because they use two different size mufflers....actually that reality is false.
It may work if no cross over pipe was used, but the minute you equalize the different sides of the exhaust system this theory no longer works....
The only real way to get rid of drone is restriction or tuning.
Borla and Bassani choose to restrict to make things quieter....
as you can see, inside the Silent Thunder Bassani catback, they split the exhaust up into two seperate pipes, then bring it back together again, causing the sound waves to cancel each other out like an X pipe might...
Borla resticts by reducing the size of the pipe inside the muffler, so in many cases, one of their 2.5" mufflers in only 2.25" in reality....
We do it through tuning the muffler. This occurs by basically using computers to figure out how the exhaust is traveling through the muffler, then figuring out how to efficiently capture the unwanted sounds......
I have heard the XR1s, and as the RPM climbs, it is pretty much physically impossible to make them "blow away" volume wise.....
The SLP, Packs, and XR1 all have pretty much the same volume at higher RPMs.....
Just the Borlas are higher pitched so it may seem louder.....
