Hello

Theres nothing inside.... this muffler was made with the intention to have a low restrictive almost free flow muffler wich will allow me to maintaing same RPM´s I was getting of this engine with no muffler but being able to lower down the noise.

I´m hoping to have a little increase in RPM´s .......let you know on Monday after trying it on Sunday.

The stinger was sealed with JB Weld.

Regards.
VÃ*ctor.