This silencer was specifically introduced into the United States for the Honda CR125 Stock Moto platform in mind.

Inlet ID on all models - 1" - fits the commonly used RLV, RCE, and SKUSA / Pro Circuit Exhaust systems built for Honda CR125 Engines 

Tube Length options - 14" and 12"

Tube Material options - Carbon Fiber or Aluminum

In Karting, we call this piece a silencer, some will call it a muffler

Includes 2 extra adjustable back pressure pills to change the tuning characteristics for either more low end performance or top end RPM's

If you are a wholesaler, this item is available for bulk pricing.  Please send me a message