The Kawasaki KFX450 Quiet Core Insert is
designed to lower the db levels of the Classic exhaust systems by as
many as 4db with minimal horsepower loss. The Quiet Core is only
available for the "Classic" model Dasa Exhaust System. If you have the
older version of our exhaust with the oval silencer, the quiet core will
not work with your exhaust even if it is a classic.
Quiet Core db Levels:
*Results may vary depending on modifications to your engine and age
of packing material. All levels are based on a slightly modified engine
with new packing pillow.