Our mufflers are shipped at a satisfying est. 85db decibel level. However, as advertised, the decibel level of our mufflers is owner adjustable. Simply follow these steps to custom tune your desired db level.
Required final tuning should take place ‘after’ you determine your desired db level:
Remove all the end cap allen head bolts using a 5/32” or 4mm allen.
Carefully coax out the end cap.
Remove the adapter if being used.
Use a hollow 1.96” O.D. tube as a ram– (A 50mm go-kart axle or 1.96” pvc pipe works well).
Insert the axle into the inlet and gently tap (do not force) the baffle out of the muffler shell. (tap only on the 3 venturi supports inside the baffle, not the venturi itself)
Each muffler has 3 sets of perforated sound blankets. Each set of blankets removed will noticeably increase your emitted decibel level.
Carefully reinstall in reverse order. Your end caps may be installed either slash up or slash down. *Remember – Our products are ‘race only’ products and are not legal for street use on pollution-controlled motor vehicles.