This is our raw Tetra-60 pipe. A raw pipe will make maximum horsepower. It's a full floating rubber mounting system that helps reduce and absorb vibration, it is also a couplered non-leak pipe. This pipe has proven to produce a huge increase in the low, mid, and top end areas of all power bands. It has a large volume center section that dumps in to a steep cone that produces wicked power! This silenced version is police and neighborhood friendly while still having a menacing tone Thand producing a huge increase in horse power and RPM range. We do also offer a non-silenced race version.