New GGB Extreme mufflers installed!
 

Had Pantera in Miami install a set of GGB Extreme Variable Mufflers while they were putting in a 525/xr in my 28 Pantera. First of all they really look great.
The sound is much nicer than the open pipes I had with flappers. I could not speak to anyone on the boat without yelling. I also did not want to quiet it down too much either. It's a perfect nice low pitched tone without the harshness and noise. Also not quiet like a corsa or typical silent choice system.
After a few hours on the water the sound does not wear you out.
One of the best additions to my boat yet!
Greg

Re: New GGB Extreme mufflers installed!
 

Troutly,
Will have to see if I can get a decibel reading. They have an internal rubber flapper with a spring that connects to the flapper and pulls back. I did remove the springs because I could hear them flaping. Graham at GGB says that will increase sound level by about 2 decibel.
Greg

Re: New GGB Extreme mufflers installed!
 

Troutly,
Can you fill us in on what happened, sounds like it didn't meet your expectations. If you don't want to reply to everyone, please send me a private message. I am interested in knowing before spending dollars...

Thanks,
Rick

Re: New GGB Extreme mufflers installed!
 

Looks great, still contemplating which ones to buy. I too am curious about Troutly's experience with HPI.

Re: New GGB Extreme mufflers installed!
 

Here is some of his thoughts.......

http://www.offshoreonly.com/forums/s...ad.php?t=56911

Re: New GGB Extreme mufflers installed!
 

Bought a UEI decibel meter to check the sound level. Will have it by this weekend to post db results.
Greg