3.5" I.D Inlet/Outlet 18" Body Resonator Mild Steel Fibreglassed Packed (Black) 1225440 MECHANICAL TACH DRIVE: No

MECHANICAL TACH DRIVE: No

1/2" hexagonal body

compound action for Powerful Non-slip locking grip aggressive grip pattern added to tightening knurls

HEIGHT: 2 3/4"

Perfect fit in screw – key cut

3.5" I.D Inlet/Outlet 18" Body Resonator Mild Steel Fibreglassed Packed (Black) 1225440 MECHANICAL TACH DRIVE: NoM&H resonator 3. 5" x 18" fibreglassed packed exhaust silencer 4db lower spiral louvre core mild steel black finish 18" body , 23. 5" total length 4" diameter Fibreglassed packed Spiral louvre core 4db lower The main distinction is that a muffler is designed to muffle the overall volume across all RPMs, whereas a resonator is designed to eliminate unwanted resonance or noise at a particular RPM, also known as exhaust drone. This is why you see some